angular.js - Is there any difference between $setTimeout in angular and native setTimeout?

Question

Is there any difference between $setTimeout in angular and native setTimeout?

Answer 1

First of all, there is no $setTimeout，是 $timeout.

Secondly, $timeout 是对 window.setTimeout is a one-layer package with basically the same functions and interfaces. The main differences are as follows:

1. The incoming function is packaged in try...catch 结构内，并且把抛出的异常委托给 $exceptionHandler for unified scheduling processing;
2. $timeout 返回的不是数字 ID，而是一个 promise 对象。这意味着你无法用 window.clearTimeout 取消它，而是要用 $timeout.cancel(returnedPromise) to cancel;
3. The third parameter passed in is a Boolean value. If false is passed in, $apply will not be used to wrap the false，则不会使用 $apply 来包装 function 调用，也就是说不会更新当前作用域内的数据绑定。默认是 truefunction
call, which means it will not Update data bindings within the current scope. The default is true.

Finally, these things are actually in the document...🎜