W3Schools.com

jQuery Syntax

With jQuery you select (query) HTML elements and perform "actions" on them.

jQuery Syntax Examples

$(this).hide()
Demonstrates the jQuery hide() method, hiding the current HTML element.

$("#test").hide()
Demonstrates the jQuery hide() method, hiding the element with id="test".

$("p").hide()
Demonstrates the jQuery hide() method, hiding all <p> elements.

$(".test").hide()
Demonstrates the jQuery hide() method, hiding all elements with class="test".

jQuery Syntax

The jQuery syntax is tailor made for selecting HTML elements and perform some action on the element(s).

Basic syntax is: $(selector).action()

  • A dollar sign to define jQuery
  • A (selector) to "query (or find)" HTML elements
  • A jQuery action() to be performed on the element(s)

Examples:

$(this).hide() - hides current element.

$("p").hide() - hides all paragraphs.

$("p.test").hide() - hides all paragraphs with class="test".

$("#test").hide() - hides the element with id="test".

lamp jQuery uses CSS selector syntax.
You will learn more about the selector syntax in the next chapter of this tutorial.

The Document Ready Function

You might have noticed that all jQuery methods, in our examples, are inside a document.ready() function:

$(document).ready(function(){

   // jQuery functions go here...

});

This is to prevent any jQuery code from running before the document is finished loading (is ready).

Here are some examples of actions that can fail if functions are run before the document is fully loaded:

  • Trying to hide an element that doesn't exist
  • Trying to get the size of an image that is not loaded

W3Schools Certification

W3Schools' Online Certification

The perfect solution for professionals who need to balance work, family, and career building.

More than 10 000 certificates already issued!

Get Your Certificate »

The HTML Certificate documents your knowledge of HTML.

The CSS Certificate documents your knowledge of advanced CSS.

The JavaScript Certificate documents your knowledge of JavaScript and HTML DOM.

The jQuery Certificate documents your knowledge of jQuery.

The XML Certificate documents your knowledge of XML, XML DOM and XSLT.

The ASP Certificate documents your knowledge of ASP, SQL, and ADO.

The PHP Certificate documents your knowledge of PHP and SQL (MySQL).

WEB HOSTING
Best Web Hosting
PHP MySQL Hosting
Best Hosting Coupons
UK Reseller Hosting
Cloud Hosting
Top Web Hosting
$3.98 Unlimited Hosting
Premium Website Design
WEB BUILDING
Download XML Editor
FREE Website BUILDER
Best Website Templates Top CSS Templates
CREATE HTML Websites
EASY WEBSITE BUILDER
W3SCHOOLS EXAMS
Get Certified in:
HTML, CSS, JavaScript, XML, PHP, and ASP
W3SCHOOLS BOOKS
New Books:
HTML, CSS
JavaScript, and Ajax
STATISTICS
Browser Statistics
Browser OS
Browser Display
SHARE THIS PAGE