* (For IE <=11) Handles a propertychange event, sending a `change` event if * the value of the active element has changed.

* @param {SyntheticEvent} event * @return {boolean} True iff number of dispatches accumulated is greater than 0.

* Call a function while guarding against errors that happens within it. * * @param {?String} name of the guard to use for logging or debugging * @p

* Return if A is an ancestor of B.

* @param {ReactComponent} component * @return {boolean}

* Registers the given hook function to run before leaving the given route. * * During a normal transition, the hook function receives the next

* Maps children that are typically specified as `props.children`. * * The provided mapFunction(child, key, index) will be called for each * leaf ch

* Mounts this component and inserts it into the DOM. * * @param {ReactComponent} componentInstance The instance to mount. * @param {DOMElement} con

* Array comparator for ReactComponents by mount ordering. * * @param {ReactComponent} c1 first component you're comparing * @param {ReactComponent}

* Returns the first child in a collection of children and verifies that there * is only one child in the collection. The current implementation of th