Saturday, 16 May 2015

Event Methods in JQuery : Part 2

Events

All the action done on a web page according to which a web page respond is called an event.

Examples 

  • Clicking on a button
  • loading of a web page
  • Key press
 Now let us take an example of mouse click event on a text written in a <p> element.
 $("p").click(); Here we have selected element <p> on the click of which something should happen. Now we will define that what should happen to on the click event.

$("p").click(function(){
  $(this).hide();
});


We have added an action on the event "click", the action is hide the current/selected element in <p> tag.

Working code of this is as follows :



<html>
 <head>
 <title>First jquery example</title>
 <!-- This line will load the bootstrap css file  -->
 <link rel="stylesheet" type="text/css" href="bootstrap.min.css">
 <!-- This file will load jquery file so that we can use its function -->
 <script type="text/javascript" src="jquery-1.7.2.min.js"></script>
 </head>
 <body>
 <div class="panel panel-primary">
  <h3 class="text-primary" align="center"> First jquery example</h3>
  <div class="panel panel-primary">
  <p align="center">Click on the this text and it will be hidden</p><br>
  <!-- <p align="center">This is the second text to hide</p> -->
  </div>
 </div>
 </body>
 <script type="text/javascript">
 /*$(document).ready(function(){
    $("p").click(function(){
      $(this).hide();
    });
 });*/

 /*The code above this line also works same as the code below. The code shown below is an alternative code for the above code*/
 $(function(){
  $("p").click(function(){
      $(this).hide();
    });
 });
 </script>
</html>

The above is just an example of click event, similar to click event we can have more events which are classified as follows

Mouse Events
  • click
  • dblcick
  • mouseenter
  • mouseleave 
Keyboard Events
  • keypress
  • keydown
  • keyup
 Form Events
  • submit
  • change
  • focus
  • blur
Document/Window Events
  • load
  • resize
  • scroll
  • unload 

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