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JS Forms Forms API

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Object Definitions Object Properties Object Methods Object Accessors Object Constructors Object Prototypes Object ECMAScript 5

JS Functions

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JS HTML DOM

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JS JSON

JSON Intro JSON Syntax JSON vs XML JSON Data Types JSON Parse JSON Stringify JSON Objects JSON Arrays JSON PHP JSON HTML JSON JSONP

JS vs jQuery

jQuery Selectors jQuery HTML jQuery CSS jQuery DOM

JS Examples

JS Examples JS HTML DOM JS HTML Input JS HTML Objects JS HTML Events JS Browser JS Exercises JS Quiz JS Certificate

JS References

JavaScript Objects HTML DOM Objects


JavaScript / jQuery DOM Selectors


jQuery vs JavaScript

jQuery was created in 2006 by John Resig. It was designed to handle Browser Incompatibilities and to simplify HTML DOM Manipulation, Event Handling, Animations, and Ajax.

For more than 10 years, jQuery has been the most popular JavaScript library in the world.

However, after JavaScript Version 5 (2009), most of the jQuery utilities can be solved with a few lines of standard JavaScript:


Finding HTML Element by Id

Return the element with id="intro":

jQuery

var myElement = $("#id01");

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JavaScript

var myElement = document.getElementById("id01");

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Finding HTML Elements by Tag Name

Return all <p> elements:

jQuery

var myElements = $("p");

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Example

var myElements = document.getElementsByTagName("p");

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Finding HTML Elements by Class Name

Return all elements with class="intro".

jQuery

var myElements = $(".intro");

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JavaScript

var myElements = document.getElementsByClassName("intro");

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Finding elements by class name does not work in Internet Explorer 8 and earlier versions.


Finding HTML Elements by CSS Selectors

Return a list of all <p> elements with class="intro".

jQuery

var myElements = $("p.intro");

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JavaScript

var myElements = document.querySelectorAll("p.intro");

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The querySelectorAll() method does not work in Internet Explorer 8 and earlier versions.