7 Amazing jQuery Tricks

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Once again, I’ve gathered some of the useful jQuery tips and tricks for you to see how great jQuery can be.

Here they are:

1. Preloading Images

With this trick you could preload images in JavaScript before using them.

jQuery.preloadImages = function()
 for(var i = 0; i ").attr("src", arguments[i]);

// Usage
$.preloadImages("image1.gif", "/path/to/image2.png", "some/image3.jpg");

Avoid XHTML 1.0 to restrict your target=blank code. Use this jQuery trick to do such thing.

 this.target = "_blank";


3. Get the total number of matched elements


4. Detect Browser

CSS’ conditional comment is pretty useful to detect browser and apply some css style.

//A. Target Safari
if( $.browser.safari ) $("#menu li a").css("padding", "1em 1.2em" );

//B. Target anything above IE6
if ($.browser.msie && $.browser.version > 6 ) $("#menu li a").css("padding", "1em 1.8em" );

//C. Target IE6 and below
if ($.browser.msie && $.browser.version < = 6 ) $("#menu li a").css("padding", "1em 1.8em" );

//D. Target Firefox 2 and above
if ($.browser.mozilla && $.browser.version >= "1.8" ) $("#menu li a").css("padding", "1em 1.8em" );

5. Columns of equal Height

Yes this is possible with the following jQuery trick.

function equalHeight(group) {
 tallest = 0;
 group.each(function() {
 thisHeight = $(this).height();
 if(thisHeight > tallest) {
 tallest = thisHeight;

$(document).ready(function() {

6. Font Resize

Resize fonts using jQuery.

 // Reset Font Size
 var originalFontSize = $('html').css('font-size');
 $('html').css('font-size', originalFontSize);
 // Increase Font Size
 var currentFontSize = $('html').css('font-size');
 var currentFontSizeNum = parseFloat(currentFontSize, 10);
 var newFontSize = currentFontSizeNum*1.2;
 $('html').css('font-size', newFontSize);
 return false;
 // Decrease Font Size
 var currentFontSize = $('html').css('font-size');
 var currentFontSizeNum = parseFloat(currentFontSize, 10);
 var newFontSize = currentFontSizeNum*0.8;
 $('html').css('font-size', newFontSize);
 return false;

7. Remove a word in a text

Remove any word in a text using this jQuery trick.

var el = $('#id');
el.html(el.html().replace(/word/ig, ""));
Sam DeeringSam Deering
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Sam Deering has 15+ years of programming and website development experience. He was a website consultant at Console, ABC News, Flight Centre, Sapient Nitro, and the QLD Government and runs a tech blog with over 1 million views per month. Currently, Sam is the Founder of Crypto News, Australia.

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