The difference between setTimeout() and setInterval() timers in JavaScript-JS Tutorial-php.cn

The difference between setTimeout() and setInterval() timers in JavaScript

藏色散人

Release： 2019-04-09 10:15:00

Original

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This article will introduce to you the differences in the use of setTimeout() and setInterval() timers in JavaScript. (Recommended: "javascript tutorial")

setTimeout() method

setTimeout() method is waiting for the specified Execute a function after the number of milliseconds.

Syntax:

window.setTimeout(function, milliseconds);
function : 第一个参数是要执行的函数
milliseconds : 表示执行前的毫秒数.

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For example, we want a prompt box to pop up 2 seconds after the user presses the "Click me!" button.

The javascript code is as follows:

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
</head>
<body>

<button onclick="setTimeout(gfg, 2000);">点击我！</button>

<script>
    function gfg()
    {
        alert(&#39;欢迎来到PHP中文网！&#39;);
    }
</script>

</body>
</html>

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Output:

Once the user presses the "Press Me" button, then after a pause of 2 seconds, a box will pop up.

The difference between setTimeout() and setInterval() timers in JavaScript

##setInterval() method

setInterval()method Repeat a given function at every given time interval.

Syntax:

window.setInterval(function, milliseconds);

function : 第一个参数是要执行的函数
milliseconds :表示每次执行之间的时间间隔的长度。

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The code example is as follows:

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
</head>
<body>

<p>我会说“你好”很多次！</p>

<p id="GFG"></p>

<script>
    var myVar = setInterval(myTimer, 1000);

    function myTimer()
    {

        document.getElementById("GFG").innerHTML += "<p>你好</p>";
    }
</script>

</body>
</html>

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A new "Hello" message will be displayed every second.

The difference between setTimeout() and setInterval() timers in JavaScript

Then:

The difference between setTimeout() and setInterval() timers in JavaScript

This article is about the two timers setTimeout() and setInterval() in JavaScript The differences are introduced, I hope it will be helpful to friends in need!

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