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Sunday, November 9, 2014
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Commonly used jQuery Event Methods: jQuery

8:42 AMSunday, November 9, 2014
All the DOM events have its equivalent jQuery methods that may be implement by programmer as per the requirement. Anything happens through input devices on the web-page is called an event.

All these events have its unique names e.g. clicking on the page, pressing key, hovering mouse etc. According to jQuery masters, these events have some categories, some of them listed below:

  • Keyboard events: KeyDown, KeyUp and KeyPress etc.
  • Mouse events: Click, double click, mouse hover, mouse enter and mouse leave etc.
  • Form events: submit, focus, blur etc. 
  • Document/window events: Load, UnLoad, scrolling, resizing etc.

All these events have its own method, discussed earlier in changing default behavior. Some of those events have listed below with example:

$(document).ready()

Whenever the document/page is ready, this event have triggered. Anything written in this event have been executed just after the page loaded. All the events except functions must be written in this event to be executed. Some of the selectors have been discussed here.
$(document).ready(function(){
alert(‘document is ready’); // This message will shown just after the page load its contents.
});

click()

This event triggers when user clicks on any html events. Programmer can write particular click method on any html event. The below code will execute when user clicks on any <p> element.
$(“p”).click(function(){
alert(‘p tag clicked’);
});

dblclick()

This event triggers when user double clicks on any html events. Programmer can write particular double click method on any html event. The below code will execute when user clicks two times on any <p> element.
$(“p”).dblclick(function(){
alert(‘p tag double clicked’);
});

mouseenter()

This event triggers when user enters mouse in the area of html events. The below code will execute when user enters into area of any <p> element.
$(“p”).mouseenter(function(){
alert(‘mouse entered in <p> tag’);
});

blur()

whenever an html event losses its focus, this event will triggered. This is just opposite event of focus() event which triggers when an element have focus on it.
$(“p”).blur(function(){
alert(‘losses focus from <p> tag’);
});

There are many events related to each html element, can be read from jQuery official website of through the help option of visual studio. All those events have similar syntax to write method for them. In the next article we will discuss about jQuery effects.

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