10 jQuery snippets every developer should know 

For this post, we would like to share with our readers 10 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; 
 }); 
   });  

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('');
}
}); 

3. Select Box Restrict

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

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'}); 
   });

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);

6. jQuery Toggle Disabled

/* HTML 
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 <input type="text"value="I &lt;3 EMOTICODE <img src="http://codegeekz.com/wp-includes/images/smilies/icon_smile.gif" alt=":)" class="wp-smiley"> " />  <input type="button" value="Toggle Disabled" />
| 
|
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*/ 
// 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();   
});   
});

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;
});
});

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 + '"']);
});
  }); 

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;
});

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;
});