Difference: The setTimeout() timer executes certain codes after the specified time, and the code will automatically stop after executing it once; while the setInterval() timer executes certain codes repeatedly according to the specified period. The timer will not stop automatically and needs to be stopped manually by calling clearInterval().
The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.
JavaScript timer, sometimes called "timer", is used to perform certain tasks after a specified time has passed, similar to the alarm clock in our lives.
In JavaScript, we can use timers to delay the execution of certain codes, or to repeatedly execute certain codes at fixed intervals. For example, you can use a timer to regularly update the ads on the page or display a real-time clock, etc.
JavaScript provides two ways to set timers, namely setTimeout() and setInterval().
setTimeout()Call a function or calculate an expression after the specified milliseconds
Pass in three parameters
code The JS code string to be executed after the function that must be called
millisec The number of milliseconds that must be waited before executing the code
lang Optional Generally do not write, select the script language type
setInterval()Call the function or calculate the expression according to the specified period. The method will continue to call the function until clearInterval is called or the window is closed
Pass in three parameters
code must be the function to be called or the code string to be executed
millisec Must be executed periodically or the time interval between calling code
lang Optional, leave half blank to select the language type
The difference between setTimeout() and setInterval() is as follows:
Method | Description |
---|---|
setTimeout() | After the specified time (unit is milliseconds), execute certain codes. The code will only be executed once |
setInterval() | Repeatedly execute certain codes according to the specified period (unit: milliseconds). The timer will not stop automatically unless the clearInterval() function is called to manually stop or close the browser window. |
[Related recommendations: javascript learning tutorial]
The above is the detailed content of What is the difference between the two timers in javascript. For more information, please follow other related articles on the PHP Chinese website!

去掉重复并排序的方法:1、使用“Array.from(new Set(arr))”或者“[…new Set(arr)]”语句,去掉数组中的重复元素,返回去重后的新数组;2、利用sort()对去重数组进行排序,语法“去重数组.sort()”。

本篇文章给大家带来了关于JavaScript的相关知识,其中主要介绍了关于Symbol类型、隐藏属性及全局注册表的相关问题,包括了Symbol类型的描述、Symbol不会隐式转字符串等问题,下面一起来看一下,希望对大家有帮助。

怎么制作文字轮播与图片轮播?大家第一想到的是不是利用js,其实利用纯CSS也能实现文字轮播与图片轮播,下面来看看实现方法,希望对大家有所帮助!

本篇文章给大家带来了关于JavaScript的相关知识,其中主要介绍了关于对象的构造函数和new操作符,构造函数是所有对象的成员方法中,最早被调用的那个,下面一起来看一下吧,希望对大家有帮助。

本篇文章给大家带来了关于JavaScript的相关知识,其中主要介绍了关于面向对象的相关问题,包括了属性描述符、数据描述符、存取描述符等等内容,下面一起来看一下,希望对大家有帮助。

方法:1、利用“点击元素对象.unbind("click");”方法,该方法可以移除被选元素的事件处理程序;2、利用“点击元素对象.off("click");”方法,该方法可以移除通过on()方法添加的事件处理程序。

本篇文章给大家带来了关于JavaScript的相关知识,其中主要介绍了关于BOM操作的相关问题,包括了window对象的常见事件、JavaScript执行机制等等相关内容,下面一起来看一下,希望对大家有帮助。

foreach不是es6的方法。foreach是es3中一个遍历数组的方法,可以调用数组的每个元素,并将元素传给回调函数进行处理,语法“array.forEach(function(当前元素,索引,数组){...})”;该方法不处理空数组。


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

SublimeText3 Linux new version
SublimeText3 Linux latest version

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

WebStorm Mac version
Useful JavaScript development tools

SublimeText3 English version
Recommended: Win version, supports code prompts!
