是否使用setTimeout（fn，0）推迟代码执行，直到当前调用堆栈可靠？ [英] Is using setTimeout(fn, 0) to defer code execution until after the current call stack reliable?

问题描述

我有一个被称为未知次数的函数。我需要知道函数运行了多少次，所以我正在做：

I've got a function that is called an unknown number of times. I need to know how many times the function was run so I'm doing:

(function () {    

    var i = 0,
        increment = function () {
            if (i === 0) {
                setTimeout(function () {
                    console.log('increment was called ' + i + ' times.'); // increment was called 3 times.
                    i = 0;
                }, 0);
            }
            i++;
        };

    increment();
    increment();
    increment();

})();

有人能告诉我这是否在所有浏览器中都是可靠的，或者是否有更好的模式来实现这一目标？

Can anyone tell me whether this is reliable across all browsers or whether there's a better pattern to achieve this?

推荐答案

setTimeout（）在队列上放置一个函数，在所有其他功能都已运行时执行。

setTimeout() places a function on the queue, which is executed when all the other functions have been run.

如果在调用<之前调用 setTimeout（）几次code> increment（），您可能会注意到 i 变量达到大于1的值。

If you call setTimeout() a few times before calling increment(), you will probably notice the i variable reaching a value greater than 1.

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