Events in JQuery and JQuery events

Events in JQuery and JQuery events
JQuery event first

 
1. Event binding in JQuery
 
In fact, the standard event binding in JQuery is written as follows: (as follows)
 
$ ("# Btn"). bind ("click", function (){});
 
But every time I Write this, it's too much trouble. How can I Write less and Do more?
 
Therefore, we are used to abbreviated it.
 
$ ("# Btn"). click (function () {}) makes it much easier
 
2. Combine event hover (enterfn, leavefn)
 
Call the enterfn method when you place the cursor over the element,
 
Call the leavefn method when the mouse leaves the element.
 
It is equivalent to the combination of mouseover and mouseout events in javascript.

Event bubbling

 
1. Description
 
Event bubbling: JQuery uses the event bubbling mechanism like JavaScript.
 
, Window. event. cancelBubble = true
 
2. Get
 
If you want to capture event-related information, add the parameter e to the response's anonymous function. e is the event object.
 
Call the stopPropagation () method of the event object to terminate the bubble.
 
E. stopPropagation ();
 
After the bubble is terminated, the program will not run on the parent element of the event source.
 
3. Event bubble chart
 

Block events

 
Block default behavior: some elements have default behavior. For example, after a hyperlink is clicked, the new link is switched and the submit button is used to submit a form by default. To prevent default behavior, you only need to call the preventDefault () of the event object () method and window. event. returnValue = false has the same effect.
 
$ ("A"). click (function (e ){
 
Alert ("All hyperlinks are temporarily prohibited from clicking ");
 
E. preventDefault ();
 
});