我什么时候应该在jquery函数中使用return false?
我发现很多这样的功能:
I found lots of functions like this one:
$(function() {
$("body a").click(function() {
alert(this.innerHTML);
return false;
});
});
此
和 $(this)在jquery中?
What's the difference between this
and $(this)
in jquery?
它们都有一行返回false;
- 我不知道何时应该在jquery函数中使用 return false
并且不知道它的用途是什么?
They all have a line return false;
- I don't know when I should use return false
in jquery function and don't know what's the use of it?
根据 jQuery事件:停止(误)使用返回假(存档链接),返回 false
调用时执行三个任务:
According to jQuery Events: Stop (Mis)Using Return False (archived link), returning false
performs three tasks when called:
- event.preventDefault();
- event.stopPropagation() ;
- 停止回调执行并在调用时立即返回。
取消所需的唯一操作默认行为是 preventDefault()
。发出返回false;
可以创建脆弱的代码。通常你只需要这样:
The only action needed to cancel the default behaviour is preventDefault()
. Issuing return false;
can create brittle code. Usually you'd want just this:
$("a").on( 'click', function (e) {
// e == our event data
e.preventDefault();
});
其次this是javascript中的DOM元素,$(this)是jQuery element
引用DOM元素。请阅读 jQuery的内容:揭秘。
And secondly "this" is a DOM element in javascript and "$(this)" is a jQuery element that references the DOM element. Read more on the topic at jQuery's this: demystified.