[JS] Two timers: setTimeout() and setInterval()

The js timer has the following two methods: setTimeout()andsetInterval()

1 setTimeout(): delay timer

Executed only once after the specified number of milliseconds .

1.1 open

The specified time is 6000 milliseconds, that is, 6s. After reaching 6s, it will be executed only once, and will not be executed after that.

const func = () => {
    
     console.log('hello') };
const timer = setTimeout(func, 6000); // 两个参数分别是：要执行的方法与时间

1.2 Clear

// 在开启定时器的同时定义一个变量来接收定时器返回的id，用于清除定时器。
clearTimeout(timer);

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2 setInterval(): cycle timer

Repeatedly calls a method at regular intervals .

2.1 open

const func = () => {
    
     console.log('循环！！！') };
const timer = setInterval(func, 6000); // 指定时间为 6s，每6s执行一次

2.2 Clear

clearInterval(timer);