node.js:如何使用 setInterval 和 clearInterval? [英] node.js: how to use setInterval and clearInterval?

问题描述

这是我在 nodeJS 中的 JS :

This is my JS in nodeJS :

function test(a, room, seconds) {
    console.log(a, room, seconds);
}

intervalid = setInterval(test, 1000, 'room', 20);
console.log('intervalid', intervalid);

返回给我的输出:

intervalid Timeout {
    _called: false,
    _idleTimeout: 1000,
    _idlePrev: TimersList {
        _idleNext: [Circular],
        _idlePrev: [Circular],
        _timer: Timer { '0': [Function: listOnTimeout], _list: [Circular] },
        _unrefed: false,
        msecs: 1000,
        nextTick: false
    },
    _idleNext: TimersList {
        _idleNext: [Circular],
        _idlePrev: [Circular],
        _timer: Timer { '0': [Function: listOnTimeout], _list: [Circular] },
        _unrefed: false,
        msecs: 1000,
        nextTick: false
    },
    _idleStart: 377,
    _onTimeout: [Function: test],
    _timerArgs: [ 'room', 20 ],
    _repeat: 1000
}

而在简单的 Javascript 中，它返回一个简单的整数

当我将时间间隔附加到现有用户对象时，例如:

When I attach interval to an existing user object, example :

user.intervalid = setInterval(test, 1000, 'room', 20);

我不能再 clearInterval 了:

I am not able to clearInterval any more :

clearInterval(user.intervalid); // does not work

推荐答案

使用 setInterval()

如果您需要以指定的时间间隔重复执行代码块怎么办?为此，Node 具有称为 setInterval() 和 clearInterval() 的方法.setInterval() 函数与 setTimeout() 非常相似，使用相同的参数，例如回调函数、延迟以及传递给回调函数的任何可选参数.

What if you need to repeat the execution of your code block at specified intervals? For this, Node has methods called setInterval() and clearInterval(). The setInterval() function is very much like setTimeout(), using the same parameters such as the callback function, delay, and any optional arguments for passing to the callback function.

setInterval() 的简单示例如下所示:

A simple example of setInterval() appears below:

var interval = setInterval(function(str1, str2) {
  console.log(str1 + " " + str2);
}, 1000, "Hello.", "How are you?");

clearInterval(interval);

当您只想保持每分钟运行一个间隔时，这是另一种方式

This is another way when you want to keep only one interval running every minute

function intervalFunc() {
    console.log("Hello!!!!");
     }
    setInterval(intervalFunc,1500);

在上面的例子中，intervalFunc() 大约每 1500 毫秒或 1.5 秒执行一次，直到它停止.希望这会有所帮助.

In the above example, intervalFunc() will execute about every 1500 milliseconds, or 1.5 seconds, until it is stopped . Hope this helps.

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