Detailed explanation of how to turn off bubbling in jQuery

In front-end development, we often need to bind multiple events, but sometimes we don't want the event to bubble up to the parent element or other elements. In this case, we need to use the event bubbling closing function. jQuery is a very excellent JavaScript framework that provides a very simple and easy-to-use event bubbling and closing function. Let’s explain in detail how to turn off bubbling in jQuery.

1. stopPropagation

stopPropagation() is a method used in jQuery to stop event bubbling. It can prevent events from propagating upward to parent elements or other elements. The usage is very simple, just add this method in the event handling function that needs to turn off event bubbling.

For example, we can prevent the event from bubbling through the following code:

$('.child').click(function(event){
   event.stopPropagation();
   // 其他代码
});

$('.parent').click(function(){
   // 父元素的点击事件处理
});

In the above code, when the child element is clicked, the event will not be passed to the parent element, only the child element will be executed. The element's own click event handling.

2. preventDefault

preventDefault() is another commonly used method that prevents the default behavior of an event. For example, we can prevent the default jump behavior of the link through the following code:

$('a').click(function(event){
   event.preventDefault();
   // 其他代码
});

In the above code, when the link is clicked, the event will not jump to the address of the link, but will execute other automatic Defined event handling.

3. return false

return false is another commonly used method, which can prevent the default behavior of the event and also prevent the event from bubbling. The method of use is very simple, just add return false in the event handling function that needs to turn off event bubbling.

For example, we can prevent event bubbling and default behavior through the following code:

$('a').click(function(){
   // 其他代码
   return false;
});

In the above code, when the link is clicked, the event will not jump to the link's address. And the event will not be propagated upward to other elements, only custom event handling will be performed.

Summary

The method to turn off event bubbling in jQuery is very simple. Commonly used methods include stopPropagation, preventDefault and return false. StopPropagation can be used alone or together with preventDefault or return false. preventDefault and return false can be used alone or together. Choosing different methods according to actual needs can make the code written more concise and efficient.

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