Essential jQuery practical skills (Part 2)_jquery

The examples in this article summarize classic and practical jQuery code development techniques. Share it with everyone for your reference. The details are as follows:
23. jQuery delayed loading function

Want to delay something?

$(document).ready(function() {
 window.setTimeout(function() {
  // do something
 }, 1000);
});

24. Remove word function

Want to remove a certain word(s)?

$(document).ready(function() {
 var el = $('#id');
 el.html(el.html().replace(/word/ig, ""));
});

25. Verify whether the element exists in the jquery object collection

Simply test with the .length property if the element exists.

$(document).ready(function() {
 if ($('#id').length) {
 // do something
 }
});

26. Make the entire DIV clickable

Want to make the complete div clickable?

$(document).ready(function() {
 $("div").click(function(){
  //get the url from href attribute and launch the url
  window.location=$(this).find("a").attr("href"); return false;
 });
// how to use
<DIV><A href="index.html">home</A></DIV>

});

27. Conversion between ID and Class

When changing the Window size, switch between ID and Class

$(document).ready(function() {
 function checkWindowSize() {
 if ( $(window).width() > 1200 ) {
  $('body').addClass('large');
 }
 else {
  $('body').removeClass('large');
 }
 }
$(window).resize(checkWindowSize);
});

28. Clone object

Clone a div or an other element.

$(document).ready(function() {
 var cloned = $('#id').clone();
// how to use
<DIV id=id></DIV>

});

29. Position the element in the middle of the screen

　Center an element in the center of your screen.

$(document).ready(function() {
 jQuery.fn.center = function () {
  this.css("position","absolute");
  this.css("top", ( $(window).height() - this.height() ) / 2+$(window).scrollTop() + "px");
  this.css("left", ( $(window).width() - this.width() ) / 2+$(window).scrollLeft() + "px");
  return this;
 }
 $("#id").center();
});

30. Write your own selector

Write your own selectors.

$(document).ready(function() {
 $.extend($.expr[':'], {
  moreThen1000px: function(a) {
   return $(a).width() > 1000;
  }
 });
 $('.box:moreThen1000px').click(function() {
  // creating a simple js alert box
  alert('The element that you have clicked is over 1000 pixels wide');
 });
});

31. Count the number of elements

Count an element.

$(document).ready(function() {
 $("p").size();
});

32. Use your own Bullets

Want to use your own bullets instead of using the standard or images bullets?

$(document).ready(function() {
 $("ul").addClass("Replaced");
 $("ul > li").prepend("‒ ");
 // how to use
 ul.Replaced { list-style : none; }
});

33. Reference the Jquery class library on the Google host

　Let Google host the jQuery script for you. This can be done in 2 ways.

//Example 1
<SCRIPT src="http://www.google.com/jsapi"></SCRIPT>
<SCRIPT type=text/javascript>
google.load("jquery", "1.2.6");
google.setOnLoadCallback(function() {
 // do something
});
</SCRIPT><SCRIPT type=text/javascript src="http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js"></SCRIPT>

 // Example 2:(the best and fastest way)
<SCRIPT type=text/javascript src="http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js"></SCRIPT>

34. Disable Jquery (animation) effect

Disable all jQuery effects

$(document).ready(function() {
 jQuery.fx.off = true;
});

35. Solution to conflicts with other Javascript libraries

To avoid conflict with other libraries on your website, you can use this jQuery Method, and assign a different variable name instead of the dollar sign.

$(document).ready(function() {
 var $jq = jQuery.noConflict();
 $jq('#id').show();
});

The above is all about the practical skills of jQuery. I hope it will be helpful to everyone's learning.