* Empties the contents of an element. * * @param {Element} el * The element to empty children from * * @return {Element} * The el

* Get pointer position in element * Returns an object with x and y coordinates. * The base on the coordinates are the bottom left of the element. *

* Returns whether or not an element has cached data * * @param {Element} el * Check if this element has cached data. * * @return {boolean}

* Detect if a value is a string with any non-whitespace characters. * * @param {string} str * The string to check * * @return {boolean} *

* Returns whether an object is `Promise`-like (i.e. has a `then` method). * * @param {Object} value * An object that may or may not be `P

* Trigger a listener only once for an event * * @param {Element|Object} elem * Element or object to bind to. * * @param {string|string[]}

* Get the actual value of an option. * * @param {string} value * The value to get * * @param {Function} [parser] * Optional fu

* Remove an element's attribute * * @param {Element} el * A DOM element * * @param {string} attribute * Attribute to remove

* Delete data for the element from the cache and the guid attr from getElementById * * @param {Element} el * Remove cached data for this ele

* Silence a Promise-like object. * * This is useful for avoiding non-harmful, but potentially confusing "uncaught * play promise" rejection error m

* Applies {@link module:stateful~StatefulMixin|StatefulMixin} to a target * object. * * If the target object is {@link module:evented|evented} and

* Throws an error if the passed string has whitespace. This is used by * class methods to be relatively consistent with the classList API. * * @par