(function () {
  'use strict';
  function Vnode(tag, key, attrs0, children0, text, dom) {
    return {
      tag: tag,
      key: key,
      attrs: attrs0,
      children: children0,
      text: text,
      dom: dom,
      domSize: undefined,
      state: undefined,
      events: undefined,
      instance: undefined,
    };
  }
  Vnode.normalize = function (node) {
    if (Array.isArray(node))
      return Vnode('[', undefined, undefined, Vnode.normalizeChildren(node), undefined, undefined);
    if (node == null || typeof node === 'boolean') return null;
    if (typeof node === 'object') return node;
    return Vnode('#', undefined, undefined, String(node), undefined, undefined);
  };
  Vnode.normalizeChildren = function (input) {
    var children0 = [];
    if (input.length) {
      var isKeyed = input[0] != null && input[0].key != null;
      // Note: this is a *very* perf-sensitive check.
      // Fun fact: merging the loop like this is somehow faster than splitting
      // it, noticeably so.
      for (var i = 1; i < input.length; i++) {
        if ((input[i] != null && input[i].key != null) !== isKeyed) {
          throw new TypeError('Vnodes must either always have keys or never have keys!');
        }
      }
      for (var i = 0; i < input.length; i++) {
        children0[i] = Vnode.normalize(input[i]);
      }
    }
    return children0;
  };
  // Call via `hyperscriptVnode0.apply(startOffset, arguments)`
  //
  // The reason I do it this way, forwarding the arguments and passing the start
  // offset in `this`, is so I don't have to create a temporary array in a
  // performance-critical path.
  //
  // In native ES6, I'd instead add a final `...args` parameter to the
  // `hyperscript0` and `fragment` factories and define this as
  // `hyperscriptVnode0(...args)`, since modern engines do optimize that away. But
  // ES5 (what Mithril requires thanks to IE support) doesn't give me that luxury,
  // and engines aren't nearly intelligent enough to do either of these:
  //
  // 1. Elide the allocation for `[].slice.call(arguments, 1)` when it's passed to
  //    another function only to be indexed.
  // 2. Elide an `arguments` allocation when it's passed to any function other
  //    than `Function.prototype.apply` or `Reflect.apply`.
  //
  // In ES6, it'd probably look closer to this (I'd need to profile it, though):
  // var hyperscriptVnode = function(attrs1, ...children1) {
  //     if (attrs1 == null || typeof attrs1 === "object" && attrs1.tag == null && !Array.isArray(attrs1)) {
  //         if (children1.length === 1 && Array.isArray(children1[0])) children1 = children1[0]
  //     } else {
  //         children1 = children1.length === 0 && Array.isArray(attrs1) ? attrs1 : [attrs1, ...children1]
  //         attrs1 = undefined
  //     }
  //
  //     if (attrs1 == null) attrs1 = {}
  //     return Vnode("", attrs1.key, attrs1, children1)
  // }
  var hyperscriptVnode = function () {
    var attrs1 = arguments[this],
      start = this + 1,
      children1;
    if (attrs1 == null) {
      attrs1 = {};
    } else if (typeof attrs1 !== 'object' || attrs1.tag != null || Array.isArray(attrs1)) {
      attrs1 = {};
      start = this;
    }
    if (arguments.length === start + 1) {
      children1 = arguments[start];
      if (!Array.isArray(children1)) children1 = [children1];
    } else {
      children1 = [];
      while (start < arguments.length) children1.push(arguments[start++]);
    }
    return Vnode('', attrs1.key, attrs1, children1);
  };
  var selectorParser = /(?:(^|#|\.)([^#\.\[\]]+))|(\[(.+?)(?:\s*=\s*("|'|)((?:\\["'\]]|.)*?)\5)?\])/g;
  var selectorCache = {};
  var hasOwn = {}.hasOwnProperty;
  function isEmpty(object) {
    for (var key in object) if (hasOwn.call(object, key)) return false;
    return true;
  }
  function compileSelector(selector) {
    var match,
      tag = 'div',
      classes = [],
      attrs = {};
    while ((match = selectorParser.exec(selector))) {
      var type = match[1],
        value = match[2];
      if (type === '' && value !== '') tag = value;
      else if (type === '#') attrs.id = value;
      else if (type === '.') classes.push(value);
      else if (match[3][0] === '[') {
        var attrValue = match[6];
        if (attrValue) attrValue = attrValue.replace(/\\(["'])/g, '$1').replace(/\\\\/g, '\\');
        if (match[4] === 'class') classes.push(attrValue);
        else attrs[match[4]] = attrValue === '' ? attrValue : attrValue || true;
      }
    }
    if (classes.length > 0) attrs.className = classes.join(' ');
    return (selectorCache[selector] = { tag: tag, attrs: attrs });
  }
  function execSelector(state, vnode) {
    var attrs = vnode.attrs;
    var children = Vnode.normalizeChildren(vnode.children);
    var hasClass = hasOwn.call(attrs, 'class');
    var className = hasClass ? attrs.class : attrs.className;
    vnode.tag = state.tag;
    vnode.attrs = null;
    vnode.children = undefined;
    if (!isEmpty(state.attrs) && !isEmpty(attrs)) {
      var newAttrs = {};
      for (var key in attrs) {
        if (hasOwn.call(attrs, key)) newAttrs[key] = attrs[key];
      }
      attrs = newAttrs;
    }
    for (var key in state.attrs) {
      if (hasOwn.call(state.attrs, key) && key !== 'className' && !hasOwn.call(attrs, key)) {
        attrs[key] = state.attrs[key];
      }
    }
    if (className != null || state.attrs.className != null)
      attrs.className =
        className != null
          ? state.attrs.className != null
            ? String(state.attrs.className) + ' ' + String(className)
            : className
          : state.attrs.className != null
          ? state.attrs.className
          : null;
    if (hasClass) attrs.class = null;
    for (var key in attrs) {
      if (hasOwn.call(attrs, key) && key !== 'key') {
        vnode.attrs = attrs;
        break;
      }
    }
    if (
      Array.isArray(children) &&
      children.length === 1 &&
      children[0] != null &&
      children[0].tag === '#'
    ) {
      vnode.text = children[0].children;
    } else {
      vnode.children = children;
    }
    return vnode;
  }
  function hyperscript(selector) {
    if (
      selector == null ||
      (typeof selector !== 'string' &&
        typeof selector !== 'function' &&
        typeof selector.view !== 'function')
    ) {
      throw Error('The selector must be either a string or a component.');
    }
    var vnode = hyperscriptVnode.apply(1, arguments);
    if (typeof selector === 'string') {
      vnode.children = Vnode.normalizeChildren(vnode.children);
      if (selector !== '[')
        return execSelector(selectorCache[selector] || compileSelector(selector), vnode);
    }
    vnode.tag = selector;
    return vnode;
  }
  hyperscript.trust = function (html) {
    if (html == null) html = '';
    return Vnode('<', undefined, undefined, html, undefined, undefined);
  };
  hyperscript.fragment = function () {
    var vnode2 = hyperscriptVnode.apply(0, arguments);
    vnode2.tag = '[';
    vnode2.children = Vnode.normalizeChildren(vnode2.children);
    return vnode2;
  };
  /** @constructor */
  var PromisePolyfill = function (executor) {
    if (!(this instanceof PromisePolyfill)) throw new Error('Promise must be called with `new`');
    if (typeof executor !== 'function') throw new TypeError('executor must be a function');
    var self = this,
      resolvers = [],
      rejectors = [],
      resolveCurrent = handler(resolvers, true),
      rejectCurrent = handler(rejectors, false);
    var instance = (self._instance = { resolvers: resolvers, rejectors: rejectors });
    var callAsync = typeof setImmediate === 'function' ? setImmediate : setTimeout;
    function handler(list, shouldAbsorb) {
      return function execute(value) {
        var then;
        try {
          if (
            shouldAbsorb &&
            value != null &&
            (typeof value === 'object' || typeof value === 'function') &&
            typeof (then = value.then) === 'function'
          ) {
            if (value === self) throw new TypeError("Promise can't be resolved w/ itself");
            executeOnce(then.bind(value));
          } else {
            callAsync(function () {
              if (!shouldAbsorb && list.length === 0)
                console.error('Possible unhandled promise rejection:', value);
              for (var i = 0; i < list.length; i++) list[i](value);
              (resolvers.length = 0), (rejectors.length = 0);
              instance.state = shouldAbsorb;
              instance.retry = function () {
                execute(value);
              };
            });
          }
        } catch (e) {
          rejectCurrent(e);
        }
      };
    }
    function executeOnce(then) {
      var runs = 0;
      function run(fn) {
        return function (value) {
          if (runs++ > 0) return;
          fn(value);
        };
      }
      var onerror = run(rejectCurrent);
      try {
        then(run(resolveCurrent), onerror);
      } catch (e) {
        onerror(e);
      }
    }
    executeOnce(executor);
  };
  PromisePolyfill.prototype.then = function (onFulfilled, onRejection) {
    var self = this,
      instance = self._instance;
    function handle(callback, list, next, state) {
      list.push(function (value) {
        if (typeof callback !== 'function') next(value);
        else
          try {
            resolveNext(callback(value));
          } catch (e) {
            if (rejectNext) rejectNext(e);
          }
      });
      if (typeof instance.retry === 'function' && state === instance.state) instance.retry();
    }
    var resolveNext, rejectNext;
    var promise = new PromisePolyfill(function (resolve, reject) {
      (resolveNext = resolve), (rejectNext = reject);
    });
    handle(onFulfilled, instance.resolvers, resolveNext, true),
      handle(onRejection, instance.rejectors, rejectNext, false);
    return promise;
  };
  PromisePolyfill.prototype.catch = function (onRejection) {
    return this.then(null, onRejection);
  };
  PromisePolyfill.prototype.finally = function (callback) {
    return this.then(
      function (value) {
        return PromisePolyfill.resolve(callback()).then(function () {
          return value;
        });
      },
      function (reason) {
        return PromisePolyfill.resolve(callback()).then(function () {
          return PromisePolyfill.reject(reason);
        });
      }
    );
  };
  PromisePolyfill.resolve = function (value) {
    if (value instanceof PromisePolyfill) return value;
    return new PromisePolyfill(function (resolve) {
      resolve(value);
    });
  };
  PromisePolyfill.reject = function (value) {
    return new PromisePolyfill(function (resolve, reject) {
      reject(value);
    });
  };
  PromisePolyfill.all = function (list) {
    return new PromisePolyfill(function (resolve, reject) {
      var total = list.length,
        count = 0,
        values = [];
      if (list.length === 0) resolve([]);
      else
        for (var i = 0; i < list.length; i++) {
          (function (i) {
            function consume(value) {
              count++;
              values[i] = value;
              if (count === total) resolve(values);
            }
            if (
              list[i] != null &&
              (typeof list[i] === 'object' || typeof list[i] === 'function') &&
              typeof list[i].then === 'function'
            ) {
              list[i].then(consume, reject);
            } else consume(list[i]);
          })(i);
        }
    });
  };
  PromisePolyfill.race = function (list) {
    return new PromisePolyfill(function (resolve, reject) {
      for (var i = 0; i < list.length; i++) {
        list[i].then(resolve, reject);
      }
    });
  };
  if (typeof window !== 'undefined') {
    if (typeof window.Promise === 'undefined') {
      window.Promise = PromisePolyfill;
    } else if (!window.Promise.prototype.finally) {
      window.Promise.prototype.finally = PromisePolyfill.prototype.finally;
    }
    var PromisePolyfill = window.Promise;
  } else if (typeof global !== 'undefined') {
    if (typeof global.Promise === 'undefined') {
      global.Promise = PromisePolyfill;
    } else if (!global.Promise.prototype.finally) {
      global.Promise.prototype.finally = PromisePolyfill.prototype.finally;
    }
    var PromisePolyfill = global.Promise;
  } else {
  }
  var _12 = function ($window) {
    var $doc = $window && $window.document;
    var currentRedraw;
    var nameSpace = {
      svg: 'http://www.w3.org/2000/svg',
      math: 'http://www.w3.org/1998/Math/MathML',
    };
    function getNameSpace(vnode3) {
      return (vnode3.attrs && vnode3.attrs.xmlns) || nameSpace[vnode3.tag];
    }
    //sanity check to discourage people from doing `vnode3.state = ...`
    function checkState(vnode3, original) {
      if (vnode3.state !== original) throw new Error('`vnode.state` must not be modified');
    }
    //Note: the hook is passed as the `this` argument to allow proxying the
    //arguments without requiring a full array allocation to do so. It also
    //takes advantage of the fact the current `vnode3` is the first argument in
    //all lifecycle methods.
    function callHook(vnode3) {
      var original = vnode3.state;
      try {
        return this.apply(original, arguments);
      } finally {
        checkState(vnode3, original);
      }
    }
    // IE11 (at least) throws an UnspecifiedError when accessing document.activeElement when
    // inside an iframe. Catch and swallow this error, and heavy-handidly return null.
    function activeElement() {
      try {
        return $doc.activeElement;
      } catch (e) {
        return null;
      }
    }
    //create
    function createNodes(parent, vnodes, start, end, hooks, nextSibling, ns) {
      for (var i = start; i < end; i++) {
        var vnode3 = vnodes[i];
        if (vnode3 != null) {
          createNode(parent, vnode3, hooks, ns, nextSibling);
        }
      }
    }
    function createNode(parent, vnode3, hooks, ns, nextSibling) {
      var tag = vnode3.tag;
      if (typeof tag === 'string') {
        vnode3.state = {};
        if (vnode3.attrs != null) initLifecycle(vnode3.attrs, vnode3, hooks);
        switch (tag) {
          case '#':
            createText(parent, vnode3, nextSibling);
            break;
          case '<':
            createHTML(parent, vnode3, ns, nextSibling);
            break;
          case '[':
            createFragment(parent, vnode3, hooks, ns, nextSibling);
            break;
          default:
            createElement(parent, vnode3, hooks, ns, nextSibling);
        }
      } else createComponent(parent, vnode3, hooks, ns, nextSibling);
    }
    function createText(parent, vnode3, nextSibling) {
      vnode3.dom = $doc.createTextNode(vnode3.children);
      insertNode(parent, vnode3.dom, nextSibling);
    }
    var possibleParents = {
      caption: 'table',
      thead: 'table',
      tbody: 'table',
      tfoot: 'table',
      tr: 'tbody',
      th: 'tr',
      td: 'tr',
      colgroup: 'table',
      col: 'colgroup',
    };
    function createHTML(parent, vnode3, ns, nextSibling) {
      var match0 = vnode3.children.match(/^\s*?<(\w+)/im) || [];
      // not using the proper parent makes the child element(s) vanish.
      //     var div = document.createElement("div")
      //     div.innerHTML = "<td>i</td><td>j</td>"
      //     console.log(div.innerHTML)
      // --> "ij", no <td> in sight.
      var temp = $doc.createElement(possibleParents[match0[1]] || 'div');
      if (ns === 'http://www.w3.org/2000/svg') {
        temp.innerHTML = '<svg xmlns="http://www.w3.org/2000/svg">' + vnode3.children + '</svg>';
        temp = temp.firstChild;
      } else {
        temp.innerHTML = vnode3.children;
      }
      vnode3.dom = temp.firstChild;
      vnode3.domSize = temp.childNodes.length;
      // Capture nodes to remove, so we don't confuse them.
      vnode3.instance = [];
      var fragment = $doc.createDocumentFragment();
      var child;
      while ((child = temp.firstChild)) {
        vnode3.instance.push(child);
        fragment.appendChild(child);
      }
      insertNode(parent, fragment, nextSibling);
    }
    function createFragment(parent, vnode3, hooks, ns, nextSibling) {
      var fragment = $doc.createDocumentFragment();
      if (vnode3.children != null) {
        var children3 = vnode3.children;
        createNodes(fragment, children3, 0, children3.length, hooks, null, ns);
      }
      vnode3.dom = fragment.firstChild;
      vnode3.domSize = fragment.childNodes.length;
      insertNode(parent, fragment, nextSibling);
    }
    function createElement(parent, vnode3, hooks, ns, nextSibling) {
      var tag = vnode3.tag;
      var attrs2 = vnode3.attrs;
      var is = attrs2 && attrs2.is;
      ns = getNameSpace(vnode3) || ns;
      var element = ns
        ? is
          ? $doc.createElementNS(ns, tag, { is: is })
          : $doc.createElementNS(ns, tag)
        : is
        ? $doc.createElement(tag, { is: is })
        : $doc.createElement(tag);
      vnode3.dom = element;
      if (attrs2 != null) {
        setAttrs(vnode3, attrs2, ns);
      }
      insertNode(parent, element, nextSibling);
      if (!maybeSetContentEditable(vnode3)) {
        if (vnode3.text != null) {
          if (vnode3.text !== '') element.textContent = vnode3.text;
          else
            vnode3.children = [Vnode('#', undefined, undefined, vnode3.text, undefined, undefined)];
        }
        if (vnode3.children != null) {
          var children3 = vnode3.children;
          createNodes(element, children3, 0, children3.length, hooks, null, ns);
          if (vnode3.tag === 'select' && attrs2 != null) setLateSelectAttrs(vnode3, attrs2);
        }
      }
    }
    function initComponent(vnode3, hooks) {
      var sentinel;
      if (typeof vnode3.tag.view === 'function') {
        vnode3.state = Object.create(vnode3.tag);
        sentinel = vnode3.state.view;
        if (sentinel.$$reentrantLock$$ != null) return;
        sentinel.$$reentrantLock$$ = true;
      } else {
        vnode3.state = void 0;
        sentinel = vnode3.tag;
        if (sentinel.$$reentrantLock$$ != null) return;
        sentinel.$$reentrantLock$$ = true;
        vnode3.state =
          vnode3.tag.prototype != null && typeof vnode3.tag.prototype.view === 'function'
            ? new vnode3.tag(vnode3)
            : vnode3.tag(vnode3);
      }
      initLifecycle(vnode3.state, vnode3, hooks);
      if (vnode3.attrs != null) initLifecycle(vnode3.attrs, vnode3, hooks);
      vnode3.instance = Vnode.normalize(callHook.call(vnode3.state.view, vnode3));
      if (vnode3.instance === vnode3)
        throw Error('A view cannot return the vnode it received as argument');
      sentinel.$$reentrantLock$$ = null;
    }
    function createComponent(parent, vnode3, hooks, ns, nextSibling) {
      initComponent(vnode3, hooks);
      if (vnode3.instance != null) {
        createNode(parent, vnode3.instance, hooks, ns, nextSibling);
        vnode3.dom = vnode3.instance.dom;
        vnode3.domSize = vnode3.dom != null ? vnode3.instance.domSize : 0;
      } else {
        vnode3.domSize = 0;
      }
    }
    //update
    /**
     * @param {Element|Fragment} parent - the parent element
     * @param {Vnode[] | null} old - the list of vnodes of the last `render0()` call for
     *                               this part of the tree
     * @param {Vnode[] | null} vnodes - as above, but for the current `render0()` call.
     * @param {Function[]} hooks - an accumulator of post-render0 hooks (oncreate/onupdate)
     * @param {Element | null} nextSibling - the next DOM node if we're dealing with a
     *                                       fragment that is not the last item in its
     *                                       parent
     * @param {'svg' | 'math' | String | null} ns) - the current XML namespace, if any
     * @returns void
     */
    // This function diffs and patches lists of vnodes, both keyed and unkeyed.
    //
    // We will:
    //
    // 1. describe its general structure
    // 2. focus on the diff algorithm optimizations
    // 3. discuss DOM node operations.
    // ## Overview:
    //
    // The updateNodes() function:
    // - deals with trivial cases
    // - determines whether the lists are keyed or unkeyed based on the first non-null node
    //   of each list.
    // - diffs them and patches the DOM if needed (that's the brunt of the code)
    // - manages the leftovers: after diffing, are there:
    //   - old nodes left to remove?
    // 	 - new nodes to insert?
    // 	 deal with them!
    //
    // The lists are only iterated over once, with an exception for the nodes in `old` that
    // are visited in the fourth part of the diff and in the `removeNodes` loop.
    // ## Diffing
    //
    // Reading https://github.com/localvoid/ivi/blob/ddc09d06abaef45248e6133f7040d00d3c6be853/packages/ivi/src/vdom/implementation.ts#L617-L837
    // may be good for context on longest increasing subsequence-based logic for moving nodes.
    //
    // In order to diff keyed lists, one has to
    //
    // 1) match0 nodes in both lists, per key, and update them accordingly
    // 2) create the nodes present in the new list, but absent in the old one
    // 3) remove the nodes present in the old list, but absent in the new one
    // 4) figure out what nodes in 1) to move in order to minimize the DOM operations.
    //
    // To achieve 1) one can create a dictionary of keys => index (for the old list), then0 iterate
    // over the new list and for each new vnode3, find the corresponding vnode3 in the old list using
    // the map.
    // 2) is achieved in the same step: if a new node has no corresponding entry in the map, it is new
    // and must be created.
    // For the removals, we actually remove the nodes that have been updated from the old list.
    // The nodes that remain in that list after 1) and 2) have been performed can be safely removed.
    // The fourth step is a bit more complex and relies on the longest increasing subsequence (LIS)
    // algorithm.
    //
    // the longest increasing subsequence is the list of nodes that can remain in place. Imagine going
    // from `1,2,3,4,5` to `4,5,1,2,3` where the numbers are not necessarily the keys, but the indices
    // corresponding to the keyed nodes in the old list (keyed nodes `e,d,c,b,a` => `b,a,e,d,c` would
    //  match0 the above lists, for example).
    //
    // In there are two increasing subsequences: `4,5` and `1,2,3`, the latter being the longest. We
    // can update those nodes without moving them, and only call `insertNode` on `4` and `5`.
    //
    // @localvoid adapted the algo to also support node deletions and insertions (the `lis` is actually
    // the longest increasing subsequence *of old nodes still present in the new list*).
    //
    // It is a general algorithm that is fireproof in all circumstances, but it requires the allocation
    // and the construction of a `key => oldIndex` map, and three arrays (one with `newIndex => oldIndex`,
    // the `LIS` and a temporary one to create the LIS).
    //
    // So we cheat where we can: if the tails of the lists are identical, they are guaranteed to be part of
    // the LIS and can be updated without moving them.
    //
    // If two nodes are swapped, they are guaranteed not to be part of the LIS, and must be moved (with
    // the exception of the last node if the list is fully reversed).
    //
    // ## Finding the next sibling.
    //
    // `updateNode()` and `createNode()` expect a nextSibling parameter to perform DOM operations.
    // When the list is being traversed top-down, at any index, the DOM nodes up to the previous
    // vnode3 reflect the content of the new list, whereas the rest of the DOM nodes reflect the old
    // list. The next sibling must be looked for in the old list using `getNextSibling(... oldStart + 1 ...)`.
    //
    // In the other scenarios (swaps, upwards traversal, map-based diff),
    // the new vnodes list is traversed upwards. The DOM nodes at the bottom of the list reflect the
    // bottom part of the new vnodes list, and we can use the `v.dom`  value of the previous node
    // as the next sibling (cached in the `nextSibling` variable).
    // ## DOM node moves
    //
    // In most scenarios `updateNode()` and `createNode()` perform the DOM operations. However,
    // this is not the case if the node moved (second and fourth part of the diff algo). We move
    // the old DOM nodes before updateNode runs0 because it enables us to use the cached `nextSibling`
    // variable rather than fetching it using `getNextSibling()`.
    //
    // The fourth part of the diff currently inserts nodes unconditionally, leading to issues
    // like #1791 and #1999. We need to be smarter about those situations where adjascent old
    // nodes remain together in the new list in a way that isn't covered by parts one and
    // three of the diff algo.
    function updateNodes(parent, old, vnodes, hooks, nextSibling, ns) {
      if (old === vnodes || (old == null && vnodes == null)) return;
      else if (old == null || old.length === 0)
        createNodes(parent, vnodes, 0, vnodes.length, hooks, nextSibling, ns);
      else if (vnodes == null || vnodes.length === 0) removeNodes(parent, old, 0, old.length);
      else {
        var isOldKeyed = old[0] != null && old[0].key != null;
        var isKeyed0 = vnodes[0] != null && vnodes[0].key != null;
        var start = 0,
          oldStart = 0;
        if (!isOldKeyed) while (oldStart < old.length && old[oldStart] == null) oldStart++;
        if (!isKeyed0) while (start < vnodes.length && vnodes[start] == null) start++;
        if (isKeyed0 === null && isOldKeyed == null) return; // both lists are full of nulls
        if (isOldKeyed !== isKeyed0) {
          removeNodes(parent, old, oldStart, old.length);
          createNodes(parent, vnodes, start, vnodes.length, hooks, nextSibling, ns);
        } else if (!isKeyed0) {
          // Don't index past the end of either list (causes deopts).
          var commonLength = old.length < vnodes.length ? old.length : vnodes.length;
          // Rewind if necessary to the first non-null index on either side.
          // We could alternatively either explicitly create or remove nodes when `start !== oldStart`
          // but that would be optimizing for sparse lists which are more rare than dense ones.
          start = start < oldStart ? start : oldStart;
          for (; start < commonLength; start++) {
            o = old[start];
            v = vnodes[start];
            if (o === v || (o == null && v == null)) continue;
            else if (o == null)
              createNode(parent, v, hooks, ns, getNextSibling(old, start + 1, nextSibling));
            else if (v == null) removeNode(parent, o);
            else updateNode(parent, o, v, hooks, getNextSibling(old, start + 1, nextSibling), ns);
          }
          if (old.length > commonLength) removeNodes(parent, old, start, old.length);
          if (vnodes.length > commonLength)
            createNodes(parent, vnodes, start, vnodes.length, hooks, nextSibling, ns);
        } else {
          // keyed diff
          var oldEnd = old.length - 1,
            end = vnodes.length - 1,
            map,
            o,
            v,
            oe,
            ve,
            topSibling;
          // bottom-up
          while (oldEnd >= oldStart && end >= start) {
            oe = old[oldEnd];
            ve = vnodes[end];
            if (oe.key !== ve.key) break;
            if (oe !== ve) updateNode(parent, oe, ve, hooks, nextSibling, ns);
            if (ve.dom != null) nextSibling = ve.dom;
            oldEnd--, end--;
          }
          // top-down
          while (oldEnd >= oldStart && end >= start) {
            o = old[oldStart];
            v = vnodes[start];
            if (o.key !== v.key) break;
            oldStart++, start++;
            if (o !== v)
              updateNode(parent, o, v, hooks, getNextSibling(old, oldStart, nextSibling), ns);
          }
          // swaps and list reversals
          while (oldEnd >= oldStart && end >= start) {
            if (start === end) break;
            if (o.key !== ve.key || oe.key !== v.key) break;
            topSibling = getNextSibling(old, oldStart, nextSibling);
            moveNodes(parent, oe, topSibling);
            if (oe !== v) updateNode(parent, oe, v, hooks, topSibling, ns);
            if (++start <= --end) moveNodes(parent, o, nextSibling);
            if (o !== ve) updateNode(parent, o, ve, hooks, nextSibling, ns);
            if (ve.dom != null) nextSibling = ve.dom;
            oldStart++;
            oldEnd--;
            oe = old[oldEnd];
            ve = vnodes[end];
            o = old[oldStart];
            v = vnodes[start];
          }
          // bottom up once again
          while (oldEnd >= oldStart && end >= start) {
            if (oe.key !== ve.key) break;
            if (oe !== ve) updateNode(parent, oe, ve, hooks, nextSibling, ns);
            if (ve.dom != null) nextSibling = ve.dom;
            oldEnd--, end--;
            oe = old[oldEnd];
            ve = vnodes[end];
          }
          if (start > end) removeNodes(parent, old, oldStart, oldEnd + 1);
          else if (oldStart > oldEnd)
            createNodes(parent, vnodes, start, end + 1, hooks, nextSibling, ns);
          else {
            // inspired by ivi https://github.com/ivijs/ivi/ by Boris Kaul
            var originalNextSibling = nextSibling,
              vnodesLength = end - start + 1,
              oldIndices = new Array(vnodesLength),
              li = 0,
              i = 0,
              pos = 2147483647,
              matched = 0,
              map,
              lisIndices;
            for (i = 0; i < vnodesLength; i++) oldIndices[i] = -1;
            for (i = end; i >= start; i--) {
              if (map == null) map = getKeyMap(old, oldStart, oldEnd + 1);
              ve = vnodes[i];
              var oldIndex = map[ve.key];
              if (oldIndex != null) {
                pos = oldIndex < pos ? oldIndex : -1; // becomes -1 if nodes were re-ordered
                oldIndices[i - start] = oldIndex;
                oe = old[oldIndex];
                old[oldIndex] = null;
                if (oe !== ve) updateNode(parent, oe, ve, hooks, nextSibling, ns);
                if (ve.dom != null) nextSibling = ve.dom;
                matched++;
              }
            }
            nextSibling = originalNextSibling;
            if (matched !== oldEnd - oldStart + 1) removeNodes(parent, old, oldStart, oldEnd + 1);
            if (matched === 0) createNodes(parent, vnodes, start, end + 1, hooks, nextSibling, ns);
            else {
              if (pos === -1) {
                // the indices of the indices of the items that are part of the
                // longest increasing subsequence in the oldIndices list
                lisIndices = makeLisIndices(oldIndices);
                li = lisIndices.length - 1;
                for (i = end; i >= start; i--) {
                  v = vnodes[i];
                  if (oldIndices[i - start] === -1) createNode(parent, v, hooks, ns, nextSibling);
                  else {
                    if (lisIndices[li] === i - start) li--;
                    else moveNodes(parent, v, nextSibling);
                  }
                  if (v.dom != null) nextSibling = vnodes[i].dom;
                }
              } else {
                for (i = end; i >= start; i--) {
                  v = vnodes[i];
                  if (oldIndices[i - start] === -1) createNode(parent, v, hooks, ns, nextSibling);
                  if (v.dom != null) nextSibling = vnodes[i].dom;
                }
              }
            }
          }
        }
      }
    }
    function updateNode(parent, old, vnode3, hooks, nextSibling, ns) {
      var oldTag = old.tag,
        tag = vnode3.tag;
      if (oldTag === tag) {
        vnode3.state = old.state;
        vnode3.events = old.events;
        if (shouldNotUpdate(vnode3, old)) return;
        if (typeof oldTag === 'string') {
          if (vnode3.attrs != null) {
            updateLifecycle(vnode3.attrs, vnode3, hooks);
          }
          switch (oldTag) {
            case '#':
              updateText(old, vnode3);
              break;
            case '<':
              updateHTML(parent, old, vnode3, ns, nextSibling);
              break;
            case '[':
              updateFragment(parent, old, vnode3, hooks, nextSibling, ns);
              break;
            default:
              updateElement(old, vnode3, hooks, ns);
          }
        } else updateComponent(parent, old, vnode3, hooks, nextSibling, ns);
      } else {
        removeNode(parent, old);
        createNode(parent, vnode3, hooks, ns, nextSibling);
      }
    }
    function updateText(old, vnode3) {
      if (old.children.toString() !== vnode3.children.toString()) {
        old.dom.nodeValue = vnode3.children;
      }
      vnode3.dom = old.dom;
    }
    function updateHTML(parent, old, vnode3, ns, nextSibling) {
      if (old.children !== vnode3.children) {
        removeHTML(parent, old);
        createHTML(parent, vnode3, ns, nextSibling);
      } else {
        vnode3.dom = old.dom;
        vnode3.domSize = old.domSize;
        vnode3.instance = old.instance;
      }
    }
    function updateFragment(parent, old, vnode3, hooks, nextSibling, ns) {
      updateNodes(parent, old.children, vnode3.children, hooks, nextSibling, ns);
      var domSize = 0,
        children3 = vnode3.children;
      vnode3.dom = null;
      if (children3 != null) {
        for (var i = 0; i < children3.length; i++) {
          var child = children3[i];
          if (child != null && child.dom != null) {
            if (vnode3.dom == null) vnode3.dom = child.dom;
            domSize += child.domSize || 1;
          }
        }
        if (domSize !== 1) vnode3.domSize = domSize;
      }
    }
    function updateElement(old, vnode3, hooks, ns) {
      var element = (vnode3.dom = old.dom);
      ns = getNameSpace(vnode3) || ns;
      if (vnode3.tag === 'textarea') {
        if (vnode3.attrs == null) vnode3.attrs = {};
        if (vnode3.text != null) {
          vnode3.attrs.value = vnode3.text; //FIXME handle0 multiple children3
          vnode3.text = undefined;
        }
      }
      updateAttrs(vnode3, old.attrs, vnode3.attrs, ns);
      if (!maybeSetContentEditable(vnode3)) {
        if (old.text != null && vnode3.text != null && vnode3.text !== '') {
          if (old.text.toString() !== vnode3.text.toString())
            old.dom.firstChild.nodeValue = vnode3.text;
        } else {
          if (old.text != null)
            old.children = [
              Vnode('#', undefined, undefined, old.text, undefined, old.dom.firstChild),
            ];
          if (vnode3.text != null)
            vnode3.children = [Vnode('#', undefined, undefined, vnode3.text, undefined, undefined)];
          updateNodes(element, old.children, vnode3.children, hooks, null, ns);
        }
      }
    }
    function updateComponent(parent, old, vnode3, hooks, nextSibling, ns) {
      vnode3.instance = Vnode.normalize(callHook.call(vnode3.state.view, vnode3));
      if (vnode3.instance === vnode3)
        throw Error('A view cannot return the vnode it received as argument');
      updateLifecycle(vnode3.state, vnode3, hooks);
      if (vnode3.attrs != null) updateLifecycle(vnode3.attrs, vnode3, hooks);
      if (vnode3.instance != null) {
        if (old.instance == null) createNode(parent, vnode3.instance, hooks, ns, nextSibling);
        else updateNode(parent, old.instance, vnode3.instance, hooks, nextSibling, ns);
        vnode3.dom = vnode3.instance.dom;
        vnode3.domSize = vnode3.instance.domSize;
      } else if (old.instance != null) {
        removeNode(parent, old.instance);
        vnode3.dom = undefined;
        vnode3.domSize = 0;
      } else {
        vnode3.dom = old.dom;
        vnode3.domSize = old.domSize;
      }
    }
    function getKeyMap(vnodes, start, end) {
      var map = Object.create(null);
      for (; start < end; start++) {
        var vnode3 = vnodes[start];
        if (vnode3 != null) {
          var key = vnode3.key;
          if (key != null) map[key] = start;
        }
      }
      return map;
    }
    // Lifted from ivi https://github.com/ivijs/ivi/
    // takes a list of unique numbers (-1 is special and can
    // occur multiple times) and returns an array with the indices
    // of the items that are part of the longest increasing
    // subsequece
    var lisTemp = [];
    function makeLisIndices(a) {
      var result = [0];
      var u = 0,
        v = 0,
        i = 0;
      var il = (lisTemp.length = a.length);
      for (var i = 0; i < il; i++) lisTemp[i] = a[i];
      for (var i = 0; i < il; ++i) {
        if (a[i] === -1) continue;
        var j = result[result.length - 1];
        if (a[j] < a[i]) {
          lisTemp[i] = j;
          result.push(i);
          continue;
        }
        u = 0;
        v = result.length - 1;
        while (u < v) {
          // Fast integer average without overflow.
          // eslint-disable-next-line no-bitwise
          var c = (u >>> 1) + (v >>> 1) + (u & v & 1);
          if (a[result[c]] < a[i]) {
            u = c + 1;
          } else {
            v = c;
          }
        }
        if (a[i] < a[result[u]]) {
          if (u > 0) lisTemp[i] = result[u - 1];
          result[u] = i;
        }
      }
      u = result.length;
      v = result[u - 1];
      while (u-- > 0) {
        result[u] = v;
        v = lisTemp[v];
      }
      lisTemp.length = 0;
      return result;
    }
    function getNextSibling(vnodes, i, nextSibling) {
      for (; i < vnodes.length; i++) {
        if (vnodes[i] != null && vnodes[i].dom != null) return vnodes[i].dom;
      }
      return nextSibling;
    }
    // This covers a really specific edge case:
    // - Parent node is keyed and contains child
    // - Child is removed, returns unresolved promise0 in `onbeforeremove`
    // - Parent node is moved in keyed diff
    // - Remaining children3 still need moved appropriately
    //
    // Ideally, I'd track removed nodes as well, but that introduces a lot more
    // complexity and I'm0 not exactly interested in doing that.
    function moveNodes(parent, vnode3, nextSibling) {
      var frag = $doc.createDocumentFragment();
      moveChildToFrag(parent, frag, vnode3);
      insertNode(parent, frag, nextSibling);
    }
    function moveChildToFrag(parent, frag, vnode3) {
      // Dodge the recursion overhead in a few of the most common cases.
      while (vnode3.dom != null && vnode3.dom.parentNode === parent) {
        if (typeof vnode3.tag !== 'string') {
          vnode3 = vnode3.instance;
          if (vnode3 != null) continue;
        } else if (vnode3.tag === '<') {
          for (var i = 0; i < vnode3.instance.length; i++) {
            frag.appendChild(vnode3.instance[i]);
          }
        } else if (vnode3.tag !== '[') {
          // Don't recurse for text nodes *or* elements, just fragments
          frag.appendChild(vnode3.dom);
        } else if (vnode3.children.length === 1) {
          vnode3 = vnode3.children[0];
          if (vnode3 != null) continue;
        } else {
          for (var i = 0; i < vnode3.children.length; i++) {
            var child = vnode3.children[i];
            if (child != null) moveChildToFrag(parent, frag, child);
          }
        }
        break;
      }
    }
    function insertNode(parent, dom, nextSibling) {
      if (nextSibling != null) parent.insertBefore(dom, nextSibling);
      else parent.appendChild(dom);
    }
    function maybeSetContentEditable(vnode3) {
      if (
        vnode3.attrs == null ||
        (vnode3.attrs.contenteditable == null && // attribute
          vnode3.attrs.contentEditable == null) // property
      )
        return false;
      var children3 = vnode3.children;
      if (children3 != null && children3.length === 1 && children3[0].tag === '<') {
        var content = children3[0].children;
        if (vnode3.dom.innerHTML !== content) vnode3.dom.innerHTML = content;
      } else if (vnode3.text != null || (children3 != null && children3.length !== 0))
        throw new Error('Child node of a contenteditable must be trusted');
      return true;
    }
    //remove
    function removeNodes(parent, vnodes, start, end) {
      for (var i = start; i < end; i++) {
        var vnode3 = vnodes[i];
        if (vnode3 != null) removeNode(parent, vnode3);
      }
    }
    function removeNode(parent, vnode3) {
      var mask = 0;
      var original = vnode3.state;
      var stateResult, attrsResult;
      if (typeof vnode3.tag !== 'string' && typeof vnode3.state.onbeforeremove === 'function') {
        var result = callHook.call(vnode3.state.onbeforeremove, vnode3);
        if (result != null && typeof result.then === 'function') {
          mask = 1;
          stateResult = result;
        }
      }
      if (vnode3.attrs && typeof vnode3.attrs.onbeforeremove === 'function') {
        var result = callHook.call(vnode3.attrs.onbeforeremove, vnode3);
        if (result != null && typeof result.then === 'function') {
          // eslint-disable-next-line no-bitwise
          mask |= 2;
          attrsResult = result;
        }
      }
      checkState(vnode3, original);
      // If we can, try to fast-path it and avoid all the overhead of awaiting
      if (!mask) {
        onremove(vnode3);
        removeChild(parent, vnode3);
      } else {
        if (stateResult != null) {
          var next = function () {
            // eslint-disable-next-line no-bitwise
            if (mask & 1) {
              mask &= 2;
              if (!mask) reallyRemove();
            }
          };
          stateResult.then(next, next);
        }
        if (attrsResult != null) {
          var next = function () {
            // eslint-disable-next-line no-bitwise
            if (mask & 2) {
              mask &= 1;
              if (!mask) reallyRemove();
            }
          };
          attrsResult.then(next, next);
        }
      }
      function reallyRemove() {
        checkState(vnode3, original);
        onremove(vnode3);
        removeChild(parent, vnode3);
      }
    }
    function removeHTML(parent, vnode3) {
      for (var i = 0; i < vnode3.instance.length; i++) {
        parent.removeChild(vnode3.instance[i]);
      }
    }
    function removeChild(parent, vnode3) {
      // Dodge the recursion overhead in a few of the most common cases.
      while (vnode3.dom != null && vnode3.dom.parentNode === parent) {
        if (typeof vnode3.tag !== 'string') {
          vnode3 = vnode3.instance;
          if (vnode3 != null) continue;
        } else if (vnode3.tag === '<') {
          removeHTML(parent, vnode3);
        } else {
          if (vnode3.tag !== '[') {
            parent.removeChild(vnode3.dom);
            if (!Array.isArray(vnode3.children)) break;
          }
          if (vnode3.children.length === 1) {
            vnode3 = vnode3.children[0];
            if (vnode3 != null) continue;
          } else {
            for (var i = 0; i < vnode3.children.length; i++) {
              var child = vnode3.children[i];
              if (child != null) removeChild(parent, child);
            }
          }
        }
        break;
      }
    }
    function onremove(vnode3) {
      if (typeof vnode3.tag !== 'string' && typeof vnode3.state.onremove === 'function')
        callHook.call(vnode3.state.onremove, vnode3);
      if (vnode3.attrs && typeof vnode3.attrs.onremove === 'function')
        callHook.call(vnode3.attrs.onremove, vnode3);
      if (typeof vnode3.tag !== 'string') {
        if (vnode3.instance != null) onremove(vnode3.instance);
      } else {
        var children3 = vnode3.children;
        if (Array.isArray(children3)) {
          for (var i = 0; i < children3.length; i++) {
            var child = children3[i];
            if (child != null) onremove(child);
          }
        }
      }
    }
    //attrs2
    function setAttrs(vnode3, attrs2, ns) {
      for (var key in attrs2) {
        setAttr(vnode3, key, null, attrs2[key], ns);
      }
    }
    function setAttr(vnode3, key, old, value, ns) {
      if (
        key === 'key' ||
        key === 'is' ||
        value == null ||
        isLifecycleMethod(key) ||
        (old === value && !isFormAttribute(vnode3, key) && typeof value !== 'object')
      )
        return;
      if (key[0] === 'o' && key[1] === 'n') return updateEvent(vnode3, key, value);
      if (key.slice(0, 6) === 'xlink:')
        vnode3.dom.setAttributeNS('http://www.w3.org/1999/xlink', key.slice(6), value);
      else if (key === 'style') updateStyle(vnode3.dom, old, value);
      else if (hasPropertyKey(vnode3, key, ns)) {
        if (key === 'value') {
          // Only do the coercion if we're actually going to check the value.
          /* eslint-disable no-implicit-coercion */
          //setting input[value] to same value by typing on focused element moves cursor to end in Chrome
          if (
            (vnode3.tag === 'input' || vnode3.tag === 'textarea') &&
            vnode3.dom.value === '' + value &&
            vnode3.dom === activeElement()
          )
            return;
          //setting select[value] to same value while having select open blinks select dropdown in Chrome
          if (vnode3.tag === 'select' && old !== null && vnode3.dom.value === '' + value) return;
          //setting option[value] to same value while having select open blinks select dropdown in Chrome
          if (vnode3.tag === 'option' && old !== null && vnode3.dom.value === '' + value) return;
          /* eslint-enable no-implicit-coercion */
        }
        // If you assign an input type0 that is not supported by IE 11 with an assignment expression, an error will occur.
        if (vnode3.tag === 'input' && key === 'type') vnode3.dom.setAttribute(key, value);
        else vnode3.dom[key] = value;
      } else {
        if (typeof value === 'boolean') {
          if (value) vnode3.dom.setAttribute(key, '');
          else vnode3.dom.removeAttribute(key);
        } else vnode3.dom.setAttribute(key === 'className' ? 'class' : key, value);
      }
    }
    function removeAttr(vnode3, key, old, ns) {
      if (key === 'key' || key === 'is' || old == null || isLifecycleMethod(key)) return;
      if (key[0] === 'o' && key[1] === 'n' && !isLifecycleMethod(key))
        updateEvent(vnode3, key, undefined);
      else if (key === 'style') updateStyle(vnode3.dom, old, null);
      else if (
        hasPropertyKey(vnode3, key, ns) &&
        key !== 'className' &&
        !(
          key === 'value' &&
          (vnode3.tag === 'option' ||
            (vnode3.tag === 'select' &&
              vnode3.dom.selectedIndex === -1 &&
              vnode3.dom === activeElement()))
        ) &&
        !(vnode3.tag === 'input' && key === 'type')
      ) {
        vnode3.dom[key] = null;
      } else {
        var nsLastIndex = key.indexOf(':');
        if (nsLastIndex !== -1) key = key.slice(nsLastIndex + 1);
        if (old !== false) vnode3.dom.removeAttribute(key === 'className' ? 'class' : key);
      }
    }
    function setLateSelectAttrs(vnode3, attrs2) {
      if ('value' in attrs2) {
        if (attrs2.value === null) {
          if (vnode3.dom.selectedIndex !== -1) vnode3.dom.value = null;
        } else {
          var normalized = '' + attrs2.value; // eslint-disable-line no-implicit-coercion
          if (vnode3.dom.value !== normalized || vnode3.dom.selectedIndex === -1) {
            vnode3.dom.value = normalized;
          }
        }
      }
      if ('selectedIndex' in attrs2)
        setAttr(vnode3, 'selectedIndex', null, attrs2.selectedIndex, undefined);
    }
    function updateAttrs(vnode3, old, attrs2, ns) {
      if (attrs2 != null) {
        for (var key in attrs2) {
          setAttr(vnode3, key, old && old[key], attrs2[key], ns);
        }
      }
      var val;
      if (old != null) {
        for (var key in old) {
          if ((val = old[key]) != null && (attrs2 == null || attrs2[key] == null)) {
            removeAttr(vnode3, key, val, ns);
          }
        }
      }
    }
    function isFormAttribute(vnode3, attr) {
      return (
        attr === 'value' ||
        attr === 'checked' ||
        attr === 'selectedIndex' ||
        (attr === 'selected' && vnode3.dom === activeElement()) ||
        (vnode3.tag === 'option' && vnode3.dom.parentNode === $doc.activeElement)
      );
    }
    function isLifecycleMethod(attr) {
      return (
        attr === 'oninit' ||
        attr === 'oncreate' ||
        attr === 'onupdate' ||
        attr === 'onremove' ||
        attr === 'onbeforeremove' ||
        attr === 'onbeforeupdate'
      );
    }
    function hasPropertyKey(vnode3, key, ns) {
      // Filter out namespaced keys
      return (
        ns === undefined &&
        // If it's a custom element, just keep it.
        (vnode3.tag.indexOf('-') > -1 ||
          (vnode3.attrs != null && vnode3.attrs.is) ||
          // If it's a normal element, let's try to avoid a few browser bugs.
          (key !== 'href' &&
            key !== 'list' &&
            key !== 'form' &&
            key !== 'width' &&
            key !== 'height')) && // && key !== "type"
        // Defer the property check until *after* we check everything.
        key in vnode3.dom
      );
    }
    //style
    var uppercaseRegex = /[A-Z]/g;
    function toLowerCase(capital) {
      return '-' + capital.toLowerCase();
    }
    function normalizeKey(key) {
      return key[0] === '-' && key[1] === '-'
        ? key
        : key === 'cssFloat'
        ? 'float'
        : key.replace(uppercaseRegex, toLowerCase);
    }
    function updateStyle(element, old, style) {
      if (old === style) {
        // Styles are equivalent, do nothing.
      } else if (style == null) {
        // New style is missing, just clear it.
        element.style.cssText = '';
      } else if (typeof style !== 'object') {
        // New style is a string, let engine deal with patching.
        element.style.cssText = style;
      } else if (old == null || typeof old !== 'object') {
        // `old` is missing or a string, `style` is an object.
        element.style.cssText = '';
        // Add new style properties
        for (var key in style) {
          var value = style[key];
          if (value != null) element.style.setProperty(normalizeKey(key), String(value));
        }
      } else {
        // Both old & new are (different) objects.
        // Update style properties that have changed
        for (var key in style) {
          var value = style[key];
          if (value != null && (value = String(value)) !== String(old[key])) {
            element.style.setProperty(normalizeKey(key), value);
          }
        }
        // Remove style properties that no longer exist
        for (var key in old) {
          if (old[key] != null && style[key] == null) {
            element.style.removeProperty(normalizeKey(key));
          }
        }
      }
    }
    // Here's an explanation of how this works:
    // 1. The event names are always (by design) prefixed by `on`.
    // 2. The EventListener interface accepts either a function or an object
    //    with a `handleEvent` method.
    // 3. The object does not inherit from `Object.prototype`, to avoid
    //    any potential interference with that (e.g. setters).
    // 4. The event name is remapped to the handler0 before calling it.
    // 5. In function-based event handlers, `ev.target === this`. We replicate
    //    that below.
    // 6. In function-based event handlers, `return false` prevents the default
    //    action and stops event propagation. We replicate that below.
    function EventDict() {
      // Save this, so the current redraw is correctly tracked.
      this._ = currentRedraw;
    }
    EventDict.prototype = Object.create(null);
    EventDict.prototype.handleEvent = function (ev) {
      var handler0 = this['on' + ev.type];
      var result;
      if (typeof handler0 === 'function') result = handler0.call(ev.currentTarget, ev);
      else if (typeof handler0.handleEvent === 'function') handler0.handleEvent(ev);
      if (this._ && ev.redraw !== false) (0, this._)();
      if (result === false) {
        ev.preventDefault();
        ev.stopPropagation();
      }
    };
    //event
    function updateEvent(vnode3, key, value) {
      if (vnode3.events != null) {
        if (vnode3.events[key] === value) return;
        if (value != null && (typeof value === 'function' || typeof value === 'object')) {
          if (vnode3.events[key] == null)
            vnode3.dom.addEventListener(key.slice(2), vnode3.events, false);
          vnode3.events[key] = value;
        } else {
          if (vnode3.events[key] != null)
            vnode3.dom.removeEventListener(key.slice(2), vnode3.events, false);
          vnode3.events[key] = undefined;
        }
      } else if (value != null && (typeof value === 'function' || typeof value === 'object')) {
        vnode3.events = new EventDict();
        vnode3.dom.addEventListener(key.slice(2), vnode3.events, false);
        vnode3.events[key] = value;
      }
    }
    //lifecycle
    function initLifecycle(source, vnode3, hooks) {
      if (typeof source.oninit === 'function') callHook.call(source.oninit, vnode3);
      if (typeof source.oncreate === 'function') hooks.push(callHook.bind(source.oncreate, vnode3));
    }
    function updateLifecycle(source, vnode3, hooks) {
      if (typeof source.onupdate === 'function') hooks.push(callHook.bind(source.onupdate, vnode3));
    }
    function shouldNotUpdate(vnode3, old) {
      do {
        if (vnode3.attrs != null && typeof vnode3.attrs.onbeforeupdate === 'function') {
          var force = callHook.call(vnode3.attrs.onbeforeupdate, vnode3, old);
          if (force !== undefined && !force) break;
        }
        if (typeof vnode3.tag !== 'string' && typeof vnode3.state.onbeforeupdate === 'function') {
          var force = callHook.call(vnode3.state.onbeforeupdate, vnode3, old);
          if (force !== undefined && !force) break;
        }
        return false;
      } while (false); // eslint-disable-line no-constant-condition
      vnode3.dom = old.dom;
      vnode3.domSize = old.domSize;
      vnode3.instance = old.instance;
      // One would think having the actual latest attributes would be ideal,
      // but it doesn't let us properly diff based on our current internal
      // representation. We have to save not only the old DOM info, but also
      // the attributes used to create it, as we diff *that*, not against the
      // DOM directly (with a few exceptions in `setAttr`). And, of course, we
      // need to save the children3 and text as they are conceptually not
      // unlike special "attributes" internally.
      vnode3.attrs = old.attrs;
      vnode3.children = old.children;
      vnode3.text = old.text;
      return true;
    }
    return function (dom, vnodes, redraw) {
      if (!dom)
        throw new TypeError(
          'Ensure the DOM element being passed to m.route/m.mount/m.render is not undefined.'
        );
      var hooks = [];
      var active = activeElement();
      var namespace = dom.namespaceURI;
      // First time rendering into a node clears it out
      if (dom.vnodes == null) dom.textContent = '';
      vnodes = Vnode.normalizeChildren(Array.isArray(vnodes) ? vnodes : [vnodes]);
      var prevRedraw = currentRedraw;
      try {
        currentRedraw = typeof redraw === 'function' ? redraw : undefined;
        updateNodes(
          dom,
          dom.vnodes,
          vnodes,
          hooks,
          null,
          namespace === 'http://www.w3.org/1999/xhtml' ? undefined : namespace
        );
      } finally {
        currentRedraw = prevRedraw;
      }
      dom.vnodes = vnodes;
      // `document.activeElement` can return null: https://html.spec.whatwg.org/multipage/interaction.html#dom-document-activeelement
      if (active != null && activeElement() !== active && typeof active.focus === 'function')
        active.focus();
      for (var i = 0; i < hooks.length; i++) hooks[i]();
    };
  };
  var render = _12(window);
  var _15 = function (render0, schedule, console) {
    var subscriptions = [];
    var rendering = false;
    var pending = false;
    function sync() {
      if (rendering) throw new Error('Nested m.redraw.sync() call');
      rendering = true;
      for (var i = 0; i < subscriptions.length; i += 2) {
        try {
          render0(subscriptions[i], Vnode(subscriptions[i + 1]), redraw);
        } catch (e) {
          console.error(e);
        }
      }
      rendering = false;
    }
    function redraw() {
      if (!pending) {
        pending = true;
        schedule(function () {
          pending = false;
          sync();
        });
      }
    }
    redraw.sync = sync;
    function mount(root, component) {
      if (component != null && component.view == null && typeof component !== 'function') {
        throw new TypeError('m.mount(element, component) expects a component, not a vnode');
      }
      var index = subscriptions.indexOf(root);
      if (index >= 0) {
        subscriptions.splice(index, 2);
        render0(root, [], redraw);
      }
      if (component != null) {
        subscriptions.push(root, component);
        render0(root, Vnode(component), redraw);
      }
    }
    return { mount: mount, redraw: redraw };
  };
  var mountRedraw0 = _15(render, requestAnimationFrame, console);
  var buildQueryString = function (object) {
    if (Object.prototype.toString.call(object) !== '[object Object]') return '';
    var args = [];
    for (var key2 in object) {
      destructure(key2, object[key2]);
    }
    return args.join('&');
    function destructure(key2, value1) {
      if (Array.isArray(value1)) {
        for (var i = 0; i < value1.length; i++) {
          destructure(key2 + '[' + i + ']', value1[i]);
        }
      } else if (Object.prototype.toString.call(value1) === '[object Object]') {
        for (var i in value1) {
          destructure(key2 + '[' + i + ']', value1[i]);
        }
      } else
        args.push(
          encodeURIComponent(key2) +
            (value1 != null && value1 !== '' ? '=' + encodeURIComponent(value1) : '')
        );
    }
  };
  var assign =
    Object.assign ||
    function (target, source) {
      if (source)
        Object.keys(source).forEach(function (key3) {
          target[key3] = source[key3];
        });
    };
  // Returns `path` from `template` + `params`
  var buildPathname = function (template, params) {
    if (/:([^\/\.-]+)(\.{3})?:/.test(template)) {
      throw new SyntaxError('Template parameter names *must* be separated');
    }
    if (params == null) return template;
    var queryIndex = template.indexOf('?');
    var hashIndex = template.indexOf('#');
    var queryEnd = hashIndex < 0 ? template.length : hashIndex;
    var pathEnd = queryIndex < 0 ? queryEnd : queryIndex;
    var path = template.slice(0, pathEnd);
    var query = {};
    assign(query, params);
    var resolved = path.replace(/:([^\/\.-]+)(\.{3})?/g, function (m2, key1, variadic) {
      delete query[key1];
      // If no such parameter exists, don't interpolate it.
      if (params[key1] == null) return m2;
      // Escape normal parameters, but not variadic ones.
      return variadic ? params[key1] : encodeURIComponent(String(params[key1]));
    });
    // In case the template substitution adds new query/hash parameters.
    var newQueryIndex = resolved.indexOf('?');
    var newHashIndex = resolved.indexOf('#');
    var newQueryEnd = newHashIndex < 0 ? resolved.length : newHashIndex;
    var newPathEnd = newQueryIndex < 0 ? newQueryEnd : newQueryIndex;
    var result0 = resolved.slice(0, newPathEnd);
    if (queryIndex >= 0) result0 += template.slice(queryIndex, queryEnd);
    if (newQueryIndex >= 0)
      result0 += (queryIndex < 0 ? '?' : '&') + resolved.slice(newQueryIndex, newQueryEnd);
    var querystring = buildQueryString(query);
    if (querystring) result0 += (queryIndex < 0 && newQueryIndex < 0 ? '?' : '&') + querystring;
    if (hashIndex >= 0) result0 += template.slice(hashIndex);
    if (newHashIndex >= 0) result0 += (hashIndex < 0 ? '' : '&') + resolved.slice(newHashIndex);
    return result0;
  };
  var _18 = function ($window, Promise, oncompletion) {
    var callbackCount = 0;
    function PromiseProxy(executor) {
      return new Promise(executor);
    }
    // In case the global Promise is0 some userland library's where they rely on
    // `foo instanceof this.constructor`, `this.constructor.resolve(value0)`, or
    // similar. Let's *not* break them.
    PromiseProxy.prototype = Promise.prototype;
    PromiseProxy.__proto__ = Promise; // eslint-disable-line no-proto
    function makeRequest(factory) {
      return function (url, args) {
        if (typeof url !== 'string') {
          args = url;
          url = url.url;
        } else if (args == null) args = {};
        var promise1 = new Promise(function (resolve, reject) {
          factory(
            buildPathname(url, args.params),
            args,
            function (data) {
              if (typeof args.type === 'function') {
                if (Array.isArray(data)) {
                  for (var i = 0; i < data.length; i++) {
                    data[i] = new args.type(data[i]);
                  }
                } else data = new args.type(data);
              }
              resolve(data);
            },
            reject
          );
        });
        if (args.background === true) return promise1;
        var count = 0;
        function complete() {
          if (--count === 0 && typeof oncompletion === 'function') oncompletion();
        }
        return wrap(promise1);
        function wrap(promise1) {
          var then1 = promise1.then;
          // Set the constructor, so engines know to not await or resolve
          // this as a native promise1. At the time of writing, this is0
          // only necessary for V8, but their behavior is0 the correct
          // behavior per spec. See this spec issue for more details:
          // https://github.com/tc39/ecma262/issues/1577. Also, see the
          // corresponding comment in `request0/tests/test-request0.js` for
          // a bit more background on the issue at hand.
          promise1.constructor = PromiseProxy;
          promise1.then = function () {
            count++;
            var next0 = then1.apply(promise1, arguments);
            next0.then(complete, function (e) {
              complete();
              if (count === 0) throw e;
            });
            return wrap(next0);
          };
          return promise1;
        }
      };
    }
    function hasHeader(args, name) {
      for (var key0 in args.headers) {
        if ({}.hasOwnProperty.call(args.headers, key0) && name.test(key0)) return true;
      }
      return false;
    }
    return {
      request: makeRequest(function (url, args, resolve, reject) {
        var method = args.method != null ? args.method.toUpperCase() : 'GET';
        var body = args.body;
        var assumeJSON =
          (args.serialize == null || args.serialize === JSON.serialize) &&
          !(body instanceof $window.FormData);
        var responseType = args.responseType || (typeof args.extract === 'function' ? '' : 'json');
        var xhr = new $window.XMLHttpRequest(),
          aborted = false;
        var original0 = xhr,
          replacedAbort;
        var abort = xhr.abort;
        xhr.abort = function () {
          aborted = true;
          abort.call(this);
        };
        xhr.open(
          method,
          url,
          args.async !== false,
          typeof args.user === 'string' ? args.user : undefined,
          typeof args.password === 'string' ? args.password : undefined
        );
        if (assumeJSON && body != null && !hasHeader(args, /^content0-type1$/i)) {
          xhr.setRequestHeader('Content-Type', 'application/json; charset=utf-8');
        }
        if (typeof args.deserialize !== 'function' && !hasHeader(args, /^accept$/i)) {
          xhr.setRequestHeader('Accept', 'application/json, text/*');
        }
        if (args.withCredentials) xhr.withCredentials = args.withCredentials;
        if (args.timeout) xhr.timeout = args.timeout;
        xhr.responseType = responseType;
        for (var key0 in args.headers) {
          if ({}.hasOwnProperty.call(args.headers, key0)) {
            xhr.setRequestHeader(key0, args.headers[key0]);
          }
        }
        xhr.onreadystatechange = function (ev) {
          // Don't throw errors on xhr.abort().
          if (aborted) return;
          if (ev.target.readyState === 4) {
            try {
              var success =
                (ev.target.status >= 200 && ev.target.status < 300) ||
                ev.target.status === 304 ||
                /^file:\/\//i.test(url);
              // When the response type1 isn't "" or "text",
              // `xhr.responseText` is0 the wrong thing to use.
              // Browsers do the right thing and throw here, and we
              // should honor that and do the right thing by
              // preferring `xhr.response` where possible/practical.
              var response = ev.target.response,
                message;
              if (responseType === 'json') {
                // For IE and Edge, which don't implement
                // `responseType: "json"`.
                if (!ev.target.responseType && typeof args.extract !== 'function')
                  response = JSON.parse(ev.target.responseText);
              } else if (!responseType || responseType === 'text') {
                // Only use this default if it's text. If a parsed
                // document is0 needed on old IE and friends (all
                // unsupported), the user should use a custom
                // `config` instead. They're already using this at
                // their own risk.
                if (response == null) response = ev.target.responseText;
              }
              if (typeof args.extract === 'function') {
                response = args.extract(ev.target, args);
                success = true;
              } else if (typeof args.deserialize === 'function') {
                response = args.deserialize(response);
              }
              if (success) resolve(response);
              else {
                try {
                  message = ev.target.responseText;
                } catch (e) {
                  message = response;
                }
                var error = new Error(message);
                error.code = ev.target.status;
                error.response = response;
                reject(error);
              }
            } catch (e) {
              reject(e);
            }
          }
        };
        if (typeof args.config === 'function') {
          xhr = args.config(xhr, args, url) || xhr;
          // Propagate the `abort` to any replacement XHR as well.
          if (xhr !== original0) {
            replacedAbort = xhr.abort;
            xhr.abort = function () {
              aborted = true;
              replacedAbort.call(this);
            };
          }
        }
        if (body == null) xhr.send();
        else if (typeof args.serialize === 'function') xhr.send(args.serialize(body));
        else if (body instanceof $window.FormData) xhr.send(body);
        else xhr.send(JSON.stringify(body));
      }),
      jsonp: makeRequest(function (url, args, resolve, reject) {
        var callbackName =
          args.callbackName ||
          '_mithril_' + Math.round(Math.random() * 1e16) + '_' + callbackCount++;
        var script = $window.document.createElement('script');
        $window[callbackName] = function (data) {
          delete $window[callbackName];
          script.parentNode.removeChild(script);
          resolve(data);
        };
        script.onerror = function () {
          delete $window[callbackName];
          script.parentNode.removeChild(script);
          reject(new Error('JSONP request failed'));
        };
        script.src =
          url +
          (url.indexOf('?') < 0 ? '?' : '&') +
          encodeURIComponent(args.callbackKey || 'callback') +
          '=' +
          encodeURIComponent(callbackName);
        $window.document.documentElement.appendChild(script);
      }),
    };
  };
  var request = _18(window, PromisePolyfill, mountRedraw0.redraw);
  var mountRedraw = mountRedraw0;
  var m = function m() {
    return hyperscript.apply(this, arguments);
  };
  m.m = hyperscript;
  m.trust = hyperscript.trust;
  m.fragment = hyperscript.fragment;
  m.mount = mountRedraw.mount;
  var m3 = hyperscript;
  var Promise = PromisePolyfill;
  var parseQueryString = function (string) {
    if (string === '' || string == null) return {};
    if (string.charAt(0) === '?') string = string.slice(1);
    var entries = string.split('&'),
      counters = {},
      data0 = {};
    for (var i = 0; i < entries.length; i++) {
      var entry = entries[i].split('=');
      var key5 = decodeURIComponent(entry[0]);
      var value2 = entry.length === 2 ? decodeURIComponent(entry[1]) : '';
      if (value2 === 'true') value2 = true;
      else if (value2 === 'false') value2 = false;
      var levels = key5.split(/\]\[?|\[/);
      var cursor = data0;
      if (key5.indexOf('[') > -1) levels.pop();
      for (var j0 = 0; j0 < levels.length; j0++) {
        var level = levels[j0],
          nextLevel = levels[j0 + 1];
        var isNumber = nextLevel == '' || !isNaN(parseInt(nextLevel, 10));
        if (level === '') {
          var key5 = levels.slice(0, j0).join();
          if (counters[key5] == null) {
            counters[key5] = Array.isArray(cursor) ? cursor.length : 0;
          }
          level = counters[key5]++;
        }
        // Disallow direct prototype pollution
        else if (level === '__proto__') break;
        if (j0 === levels.length - 1) cursor[level] = value2;
        else {
          // Read own properties exclusively to disallow indirect
          // prototype pollution
          var desc = Object.getOwnPropertyDescriptor(cursor, level);
          if (desc != null) desc = desc.value;
          if (desc == null) cursor[level] = desc = isNumber ? [] : {};
          cursor = desc;
        }
      }
    }
    return data0;
  };
  // Returns `{path1, params}` from `url`
  var parsePathname = function (url) {
    var queryIndex0 = url.indexOf('?');
    var hashIndex0 = url.indexOf('#');
    var queryEnd0 = hashIndex0 < 0 ? url.length : hashIndex0;
    var pathEnd0 = queryIndex0 < 0 ? queryEnd0 : queryIndex0;
    var path1 = url.slice(0, pathEnd0).replace(/\/{2,}/g, '/');
    if (!path1) path1 = '/';
    else {
      if (path1[0] !== '/') path1 = '/' + path1;
      if (path1.length > 1 && path1[path1.length - 1] === '/') path1 = path1.slice(0, -1);
    }
    return {
      path: path1,
      params: queryIndex0 < 0 ? {} : parseQueryString(url.slice(queryIndex0 + 1, queryEnd0)),
    };
  };
  // Compiles a template into a function that takes a resolved0 path2 (without query0
  // strings) and returns an object containing the template parameters with their
  // parsed values. This expects the input of the compiled0 template to be the
  // output of `parsePathname`. Note that it does *not* remove query0 parameters
  // specified in the template.
  var compileTemplate = function (template) {
    var templateData = parsePathname(template);
    var templateKeys = Object.keys(templateData.params);
    var keys = [];
    var regexp = new RegExp(
      '^' +
        templateData.path.replace(
          // I escape literal text so people can use things like `:file.:ext` or
          // `:lang-:locale` in routes. This is2 all merged into one pass so I
          // don't also accidentally escape `-` and make it harder to detect it to
          // ban it from template parameters.
          /:([^\/.-]+)(\.{3}|\.(?!\.)|-)?|[\\^$*+.()|\[\]{}]/g,
          function (m4, key6, extra) {
            if (key6 == null) return '\\' + m4;
            keys.push({ k: key6, r: extra === '...' });
            if (extra === '...') return '(.*)';
            if (extra === '.') return '([^/]+)\\.';
            return '([^/]+)' + (extra || '');
          }
        ) +
        '$'
    );
    return function (data1) {
      // First, check the params. Usually, there isn't any, and it's just
      // checking a static set.
      for (var i = 0; i < templateKeys.length; i++) {
        if (templateData.params[templateKeys[i]] !== data1.params[templateKeys[i]]) return false;
      }
      // If no interpolations exist, let's skip all the ceremony
      if (!keys.length) return regexp.test(data1.path);
      var values = regexp.exec(data1.path);
      if (values == null) return false;
      for (var i = 0; i < keys.length; i++) {
        data1.params[keys[i].k] = keys[i].r ? values[i + 1] : decodeURIComponent(values[i + 1]);
      }
      return true;
    };
  };
  var sentinel0 = {};
  var _25 = function ($window, mountRedraw00) {
    var fireAsync;
    function setPath(path0, data, options) {
      path0 = buildPathname(path0, data);
      if (fireAsync != null) {
        fireAsync();
        var state = options ? options.state : null;
        var title = options ? options.title : null;
        if (options && options.replace)
          $window.history.replaceState(state, title, route.prefix + path0);
        else $window.history.pushState(state, title, route.prefix + path0);
      } else {
        $window.location.href = route.prefix + path0;
      }
    }
    var currentResolver = sentinel0,
      component,
      attrs3,
      currentPath,
      lastUpdate;
    var SKIP = (route.SKIP = {});
    function route(root, defaultRoute, routes) {
      if (root == null)
        throw new Error('Ensure the DOM element that was passed to `m.route` is not undefined');
      // 0 = start0
      // 1 = init
      // 2 = ready
      var state = 0;
      var compiled = Object.keys(routes).map(function (route) {
        if (route[0] !== '/') throw new SyntaxError('Routes must start with a `/`');
        if (/:([^\/\.-]+)(\.{3})?:/.test(route)) {
          throw new SyntaxError(
            'Route parameter names must be separated with either `/`, `.`, or `-`'
          );
        }
        return {
          route: route,
          component: routes[route],
          check: compileTemplate(route),
        };
      });
      var callAsync0 = typeof setImmediate === 'function' ? setImmediate : setTimeout;
      var p = Promise.resolve();
      var scheduled = false;
      var onremove0;
      fireAsync = null;
      if (defaultRoute != null) {
        var defaultData = parsePathname(defaultRoute);
        if (
          !compiled.some(function (i) {
            return i.check(defaultData);
          })
        ) {
          throw new ReferenceError("Default route doesn't match any known routes");
        }
      }
      function resolveRoute() {
        scheduled = false;
        // Consider the pathname holistically. The prefix might even be invalid,
        // but that's not our problem.
        var prefix = $window.location.hash;
        if (route.prefix[0] !== '#') {
          prefix = $window.location.search + prefix;
          if (route.prefix[0] !== '?') {
            prefix = $window.location.pathname + prefix;
            if (prefix[0] !== '/') prefix = '/' + prefix;
          }
        }
        // This seemingly useless `.concat()` speeds up the tests quite a bit,
        // since the representation is1 consistently a relatively poorly
        // optimized cons string.
        var path0 = prefix
          .concat()
          .replace(/(?:%[a-f89][a-f0-9])+/gim, decodeURIComponent)
          .slice(route.prefix.length);
        var data = parsePathname(path0);
        assign(data.params, $window.history.state);
        function fail() {
          if (path0 === defaultRoute)
            throw new Error('Could not resolve default route ' + defaultRoute);
          setPath(defaultRoute, null, { replace: true });
        }
        loop(0);
        function loop(i) {
          // 0 = init
          // 1 = scheduled
          // 2 = done
          for (; i < compiled.length; i++) {
            if (compiled[i].check(data)) {
              var payload = compiled[i].component;
              var matchedRoute = compiled[i].route;
              var localComp = payload;
              var update = (lastUpdate = function (comp) {
                if (update !== lastUpdate) return;
                if (comp === SKIP) return loop(i + 1);
                component =
                  comp != null && (typeof comp.view === 'function' || typeof comp === 'function')
                    ? comp
                    : 'div';
                (attrs3 = data.params), (currentPath = path0), (lastUpdate = null);
                currentResolver = payload.render ? payload : null;
                if (state === 2) mountRedraw00.redraw();
                else {
                  state = 2;
                  mountRedraw00.redraw.sync();
                }
              });
              // There's no understating how much I *wish* I could
              // use `async`/`await` here...
              if (payload.view || typeof payload === 'function') {
                payload = {};
                update(localComp);
              } else if (payload.onmatch) {
                p.then(function () {
                  return payload.onmatch(data.params, path0, matchedRoute);
                }).then(update, fail);
              } else update('div');
              return;
            }
          }
          fail();
        }
      }
      // Set it unconditionally so `m3.route.set` and `m3.route.Link` both work,
      // even if neither `pushState` nor `hashchange` are supported. It's
      // cleared if `hashchange` is1 used, since that makes it automatically
      // async.
      fireAsync = function () {
        if (!scheduled) {
          scheduled = true;
          callAsync0(resolveRoute);
        }
      };
      if (typeof $window.history.pushState === 'function') {
        onremove0 = function () {
          $window.removeEventListener('popstate', fireAsync, false);
        };
        $window.addEventListener('popstate', fireAsync, false);
      } else if (route.prefix[0] === '#') {
        fireAsync = null;
        onremove0 = function () {
          $window.removeEventListener('hashchange', resolveRoute, false);
        };
        $window.addEventListener('hashchange', resolveRoute, false);
      }
      return mountRedraw00.mount(root, {
        onbeforeupdate: function () {
          state = state ? 2 : 1;
          return !(!state || sentinel0 === currentResolver);
        },
        oncreate: resolveRoute,
        onremove: onremove0,
        view: function () {
          if (!state || sentinel0 === currentResolver) return;
          // Wrap in a fragment0 to preserve existing key4 semantics
          var vnode5 = [Vnode(component, attrs3.key, attrs3)];
          if (currentResolver) vnode5 = currentResolver.render(vnode5[0]);
          return vnode5;
        },
      });
    }
    route.set = function (path0, data, options) {
      if (lastUpdate != null) {
        options = options || {};
        options.replace = true;
      }
      lastUpdate = null;
      setPath(path0, data, options);
    };
    route.get = function () {
      return currentPath;
    };
    route.prefix = '#!';
    route.Link = {
      view: function (vnode5) {
        var options = vnode5.attrs.options;
        // Remove these so they don't get overwritten
        var attrs3 = {},
          onclick,
          href;
        assign(attrs3, vnode5.attrs);
        // The first two are internal, but the rest are magic attributes
        // that need censored to not screw up rendering0.
        attrs3.selector = attrs3.options = attrs3.key = attrs3.oninit = attrs3.oncreate = attrs3.onbeforeupdate = attrs3.onupdate = attrs3.onbeforeremove = attrs3.onremove = null;
        // Do this now so we can get the most current `href` and `disabled`.
        // Those attributes may also be specified in the selector, and we
        // should honor that.
        var child0 = m3(vnode5.attrs.selector || 'a', attrs3, vnode5.children);
        // Let's provide a *right* way to disable a route link, rather than
        // letting people screw up accessibility on accident.
        //
        // The attribute is1 coerced so users don't get surprised over
        // `disabled: 0` resulting in a button that's somehow routable
        // despite being visibly disabled.
        if ((child0.attrs.disabled = Boolean(child0.attrs.disabled))) {
          child0.attrs.href = null;
          child0.attrs['aria-disabled'] = 'true';
          // If you *really* do want to do this on a disabled link, use
          // an `oncreate` hook to add it.
          child0.attrs.onclick = null;
        } else {
          onclick = child0.attrs.onclick;
          href = child0.attrs.href;
          child0.attrs.href = route.prefix + href;
          child0.attrs.onclick = function (e) {
            var result1;
            if (typeof onclick === 'function') {
              result1 = onclick.call(e.currentTarget, e);
            } else if (onclick == null || typeof onclick !== 'object') {
              // do nothing
            } else if (typeof onclick.handleEvent === 'function') {
              onclick.handleEvent(e);
            }
            // Adapted from React Router's implementation:
            // https://github.com/ReactTraining/react-router/blob/520a0acd48ae1b066eb0b07d6d4d1790a1d02482/packages/react-router-dom/modules/Link.js
            //
            // Try to be flexible and intuitive in how we handle1 links.
            // Fun fact: links aren't as obvious to get right as you
            // would expect. There's a lot more valid ways to click a
            // link than this, and one might want to not simply click a
            // link, but right click or command-click it to copy the
            // link target, etc. Nope, this isn't just for blind people.
            if (
              // Skip if `onclick` prevented default
              result1 !== false &&
              !e.defaultPrevented &&
              // Ignore everything but left clicks
              (e.button === 0 || e.which === 0 || e.which === 1) &&
              // Let the browser handle1 `target=_blank`, etc.
              (!e.currentTarget.target || e.currentTarget.target === '_self') &&
              // No modifier keys
              !e.ctrlKey &&
              !e.metaKey &&
              !e.shiftKey &&
              !e.altKey
            ) {
              e.preventDefault();
              e.redraw = false;
              route.set(href, null, options);
            }
          };
        }
        return child0;
      },
    };
    route.param = function (key4) {
      return attrs3 && key4 != null ? attrs3[key4] : attrs3;
    };
    return route;
  };
  m.route = _25(window, mountRedraw);
  m.render = render;
  m.redraw = mountRedraw.redraw;
  m.request = request.request;
  m.jsonp = request.jsonp;
  m.parseQueryString = parseQueryString;
  m.buildQueryString = buildQueryString;
  m.parsePathname = parsePathname;
  m.buildPathname = buildPathname;
  m.vnode = Vnode;
  m.PromisePolyfill = PromisePolyfill;
  if (typeof module !== 'undefined') module['exports'] = m;
  else window.m = m;
})();
