Adds multiple event listeners with the same handler to an element.

Copies a string to the clipboard. Only works as a result of user action (i.e. inside a click event listener).

Creates a pub/sub (publish–subscribe) event hub with emit, on, and off methods.

Escapes a string for use in HTML.

Unescapes escaped HTML characters.

Returns an array containing all the siblings of the given element.

Creates a new MutationObserver and runs the provided callback for each mutation on the specified element.

Ever wanted to get the value of an HTML input element as a number? Learn an easy way to do it with this handy trick.

Converts the given array elements into <li> tags and appends them to the list of the given id.

Understand how events work in JavaScript and learn when to use event bubbling, event capturing and event delegation with this short guide.

Adds an event listener to an element with the ability to use event delegation.

Prefixes a CSS property based on the current browser.

Learn how to attach an event handler to events that is executed at most once in this JavaScript article.

Copies a string to the clipboard, returning a promise that resolves when the clipboard's contents have been updated.

Encodes a set of form elements as an object.