JavaScript Functions and Helpers

Vanilla JS utilities for writing powerful web applications without jQuery.

Selecting

Select DOM elements by CSS selector

querySelectorAll - a CSS selector method like the one provided by jQuery.

jQuery: $(selector), $(selector, context)

Select elements by class name

getElementsByClassName - a fast way of selecting DOM elements by class name in modern browsers. Does not work in IE 8 and below.

jQuery: $('.foo')

Select elements by tag name

getElementsByTagName - a fast and cross browser safe way for selecting DOM elements by tag name, e.g. "div", "a", "span", etc.

jQuery: $('div')

Select an element by ID

getElementById - a fast and cross browser safe way for selecting DOM elements.

jQuery: $('#foo')

Traversing

Match element selector

Check the current elements against a CSS selector.

jQuery: $.is()

Get parent element node

Getting the parent DOM node of an element.

jQuery: $.parent(), $.parents()

Get siblings of an element

Get the next, previous or all siblings of an element or retrieve siblings that match a given selector.

jQuery: $.siblings(), $.next(), $.nextAll(), $.prev, $.prevAll()

Get closest element by selector

Get the first element that matches the selector by testing the element itself and traversing up through its ancestors in the DOM tree.

jQuery: $.closest()

Select the children of an element

Getting the children of a DOM element.

jQuery: $.children()

Manipulation

Create a DOM element

How to create a new element and attach it to the DOM tree.

jQuery: $(string)

Replace a DOM element

Remove an element from the DOM tree and insert a new one in its place.

jQuery: $.replaceAll(), $.replaceWith()

Unwrap a DOM element

Remove the parents of an element from the DOM, leaving the element's content in place.

jQuery: $.unwrap()

Empty an element's content

Remove all child nodes of an element from the DOM.

jQuery: $.empty()

Removing an element

Remove an element from the DOM tree.

jQuery: $.remove(), $.detach()

Insert an element after or before another

Insert an HTML structure after or before a given DOM tree element.

jQuery: $.after(), $.before(), $.insertAfter(), $.insertBefore

Get the text content of an element

Get the combined text contents of an element, including its descendants, or set the text content of the element.

jQuery: $.text()

Get and set the HTML content of an element

Read or write the HTML content of an element.

jQuery: $.html()

Append or prepend to an element

Insert a new element or an HTML structure to the end or the beginning of another element's content.

jQuery: $.append(), $.appendTo(), $.prepend(), $.prependTo()

Wrap an HTML structure around an element

How to use a given container as wrapper for another DOM element.

jQuery: $.wrap(), $.wrapAll()

Clone an element

Create a deep copy of a DOM element.

jQuery: $.clone()

Iterating over a list of selected elements

How to loop through a NodeList and do something with each element.

jQuery: $.each()

Attributes

Set, get, and remove properties of DOM elements

Get the value of an input field or the href of an anchor. Learn how to work with element properties.

jQuery: $.prop()

Adding, removing, and testing for classes

addClass, removeClass, hasClass - three important functions for working with DOM element classes.

jQuery: $.addClass, $.removeClass, $.hasClass, $.toggleClass

Setting, getting, and removing data attributes

Read, write, or remove data values of an element.

jQuery: $.data()

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