10 Useful jQuery Code Snippets for Developers

Implementing JQuery into your theme will enable you in creating a more interactive and creative website. With just a few strips of code website owners can produce a myriad of custom elements as well as visually enhanced animations without the use of Flash since jQuery supports most CSS3 selectors, IDs, class names, and tag names.

Using Jquery you will be able to change an existing element within a number of ways as well as: decreasing page load time and thereby giving your end users a better experience when visiting your site.

For this post, we would like to share with our readers 10 Useful JQuery Code Snippets which we’ve collected that users can copy and paste directly into their themes by which to create some nice visual effects which will spruce up your website. Enjoy !

1. Smooth Scrolling for Internal Links

$('a[href^="#"]').bind('click.smoothscroll',function (e) {
e.preventDefault();

var anchor = this.hash,
$target = $(target);

$('html, body').stop().animate({
'scrollTop': $target.offset().top
}, 500, 'swing', function () {
window.location.hash = anchor;
});

});

 
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2. JS : jQuery Get All Nodes, Including Orphaned Text

var $element = $('#my-element');
var $nodes = $element.contents();
$nodes.each(function() {
if(this.nodeType === 3 && $.trim($(this).text())) {
$(this).wrap('');
}
});

 
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3. Select Box Restrict

$("#categories option").click(function(e){
if ($(this).parent().val().length > 2) {
$(this).removeAttr("selected");
}
});

 
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4. Facebook Get User Permissions and Send These Via Ajax

// always put this function inside a click or a user action, don't automatically open it or browser will block the popup.
$('#button_id').click(function(){
FB.login(function(logged) {
if(logged.status == "connected"){
FB.api("/me", function(response) {
$.ajax({
type: "POST",
url: "pass_value.php",
data: {fb_id: response.id, name: response.first_name, last_name: response.last_name, gender: response.gender},
success: function(){window.location.href = "gosomewhere.php"; }
});
});
}
/* in the scope u specify all permission you need, in this case you get all basic INFO and pubblish to wall permission */
}, {scope: 'publish_stream'});

});

 
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5. jQuery Remove Class with WildCard

var _c = 'your-icon-class'

$('.currency').removeClass (function (index, css) {
return (css.match (/\bicon-\S+/g) || []).join(' ');
}).addClass('icon-'+_c);

 
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6. jQuery Toggle Disabled

/* HTML
|
|
|
<input type="text" value="I &lt;3 EMOTICODE :)" />
<input type="button" value="Toggle Disabled" />
|
|
|
*/

// Plugin
(function($) {
$.fn.toggleDisabled = function() {
return this.each(function() {
var $this = $(this);
if ($this.attr('disabled')) $this.removeAttr('disabled');
else $this.attr('disabled', 'disabled');
});
};
})(jQuery);

// TEST
$(function() {
$('input:button').click(function() {
$('input:text').toggleDisabled();
});
});

 
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7. Smooth Scroller

// HTML:
//
<h1 id="anchor">Lorem Ipsum</h1>
//

<a class="topLink" href="#anchor">Back to Top</a>

$(document).ready(function() {

$("a.topLink").click(function() {
$("html, body").animate({
scrollTop: $($(this).attr("href")).offset().top + "px"
}, {
duration: 500,
easing: "swing"
});
return false;
});

});

 
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8. Form Tracking with JS and Google Analytics

var array1 = [];
$(document).ready(function () {
$('input').change(function () {
var formbox = $(this).attr('id');
array1.push(formbox);
console.log("you filled out box " + array1);
});
$('#submit').click(function () {
console.log('tracked ' + array1);
//alert('this is the order of boxes you filled out: ' + array1);
_gaq.push(['_trackEvent', 'Form', 'completed', '"' + array1 + '"']);
});
});

 
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9. Test Password Strength

$('#pass').keyup(function(e) {
var strongRegex = new RegExp("^(?=.{8,})(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])(?=.*\W).*$", "g");
var mediumRegex = new RegExp("^(?=.{7,})(((?=.*[A-Z])(?=.*[a-z]))|((?=.*[A-Z])(?=.*[0-9]))|((?=.*[a-z])(?=.*[0-9]))).*$", "g");
var enoughRegex = new RegExp("(?=.{6,}).*", "g");
if (false == enoughRegex.test($(this).val())) {
$('#passstrength').html('More Characters');
} else if (strongRegex.test($(this).val())) {
$('#passstrength').className = 'ok';
$('#passstrength').html('Strong!');
} else if (mediumRegex.test($(this).val())) {
$('#passstrength').className = 'alert';
$('#passstrength').html('Medium!');
} else {
$('#passstrength').className = 'error';
$('#passstrength').html('Weak!');
}
return true;
});

 
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10. Make Entire Div Clickable

<div class="myBox">blah blah blah.
<a href="http://google.com">link</a></div>
[/jquery]

The following lines of jQuery will make the entire div clickable:
[jquery]
$(".myBox").click(function(){
window.location=$(this).find("a").attr("href");
return false;
});

 
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