jQuery unload()Method

jQuery 事件方法jQuery Event Methods

Examples

Display a prompt message when leaving the page:

$(window).unload(function(){
    alert("Goodbye!");
});

Try it Yourself »

Definition and Usage

In jQuery version 1.8, the unload() method wasdeprecated, and removed in version 3.0.

Firefox and Chrome block pop-ups, so there is no way to see the effect.

The unload event occurs when the user leaves the page.

The unload event is triggered in the following cases:

  • Clicking a link that leaves the page
  • Typing a new URL in the address bar
  • Using the forward or back button
  • Closing the browser window
  • Reloading the page

The unload() method specifies what happens when the unload event occurs.

The unload() method applies only to the window object.

Note:The unload event behaves differently in different browsers. Be sure to test the method in all browsers before using it.


Syntax

$(selector).unload(function)

Parameter Description
function Required. Specifies the function to run when the unload event is triggered.


jQuery 事件方法jQuery Event Methods

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