js prohibits browser back event
This time I will bring you js to disable browser back events. What are the precautions for js to disable browser back events? The following is a practical case, let’s take a look.
In the project, I encountered the problem of pressing the Backspace key to make the browser go back. I searched for several solutions on the Internet, but none of them were ideal. So we gathered everyone’s wisdom and learned from the strengths of many families, and summarized it as follows: 1. Define the method to prevent Backspace in public jsfunction banBackSpace(e){
var ev = e || window.event;
//各种浏览器下获取事件对象
var obj = ev.relatedTarget || ev.srcElement || ev.target ||ev.currentTarget;
//按下Backspace键
if(ev.keyCode == 8){
var tagName = obj.nodeName //标签名称
//如果标签不是input或者textarea则阻止Backspace
if(tagName!='INPUT' && tagName!='TEXTAREA'){
return stopIt(ev);
}
var tagType = obj.type.toUpperCase();//标签类型
//input标签除了下面几种类型，全部阻止Backspace
if(tagName=='INPUT' && (tagType!='TEXT' && tagType!='TEXTAREA' && tagType!='PASSWORD')){
return stopIt(ev);
}
//input或者textarea输入框如果不可编辑则阻止Backspace
if((tagName=='INPUT' || tagName=='TEXTAREA') && (obj.readOnly==true || obj.disabled ==true)){
return stopIt(ev);
}
}
}
function stopIt(ev){
if(ev.preventDefault ){
//preventDefault()方法阻止元素发生默认的行为
ev.preventDefault();
}
if(ev.returnValue){
//IE浏览器下用window.event.returnValue = false;实现阻止元素发生默认的行为
ev.returnValue = false;
}
return false;
}$(function(){
//实现对字符码的截获，keypress中屏蔽了这些功能按键
document.onkeypress = banBackSpace;
//对功能按键的获取
document.onkeydown = banBackSpace;
})JS home page news sliding effect
JS click cycle to switch to play pictures
The above is the detailed content of js prohibits browser back event. For more information, please follow other related articles on the PHP Chinese website!
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
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
How to implement an online speech recognition system using WebSocket and JavaScript
Dec 17, 2023 pm 02:54 PM
How to use WebSocket and JavaScript to implement an online speech recognition system Introduction: With the continuous development of technology, speech recognition technology has become an important part of the field of artificial intelligence. The online speech recognition system based on WebSocket and JavaScript has the characteristics of low latency, real-time and cross-platform, and has become a widely used solution. This article will introduce how to use WebSocket and JavaScript to implement an online speech recognition system.
How to remove Firefox Snap in Ubuntu Linux?
Feb 21, 2024 pm 07:00 PM
To remove FirefoxSnap in Ubuntu Linux, you can follow these steps: Open a terminal and log in to your Ubuntu system as administrator. Run the following command to uninstall FirefoxSnap: sudosnapremovefirefox You will be prompted for your administrator password. Enter your password and press Enter to confirm. Wait for command execution to complete. Once completed, FirefoxSnap will be completely removed. Note that this will remove versions of Firefox installed via the Snap package manager. If you installed another version of Firefox through other means (such as the APT package manager), you will not be affected. Go through the above steps
WebSocket and JavaScript: key technologies for implementing real-time monitoring systems
Dec 17, 2023 pm 05:30 PM
WebSocket and JavaScript: Key technologies for realizing real-time monitoring systems Introduction: With the rapid development of Internet technology, real-time monitoring systems have been widely used in various fields. One of the key technologies to achieve real-time monitoring is the combination of WebSocket and JavaScript. This article will introduce the application of WebSocket and JavaScript in real-time monitoring systems, give code examples, and explain their implementation principles in detail. 1. WebSocket technology
How to use JavaScript and WebSocket to implement a real-time online ordering system
Dec 17, 2023 pm 12:09 PM
Introduction to how to use JavaScript and WebSocket to implement a real-time online ordering system: With the popularity of the Internet and the advancement of technology, more and more restaurants have begun to provide online ordering services. In order to implement a real-time online ordering system, we can use JavaScript and WebSocket technology. WebSocket is a full-duplex communication protocol based on the TCP protocol, which can realize real-time two-way communication between the client and the server. In the real-time online ordering system, when the user selects dishes and places an order
How to implement an online reservation system using WebSocket and JavaScript
Dec 17, 2023 am 09:39 AM
How to use WebSocket and JavaScript to implement an online reservation system. In today's digital era, more and more businesses and services need to provide online reservation functions. It is crucial to implement an efficient and real-time online reservation system. This article will introduce how to use WebSocket and JavaScript to implement an online reservation system, and provide specific code examples. 1. What is WebSocket? WebSocket is a full-duplex method on a single TCP connection.
JavaScript and WebSocket: Building an efficient real-time weather forecasting system
Dec 17, 2023 pm 05:13 PM
JavaScript and WebSocket: Building an efficient real-time weather forecast system Introduction: Today, the accuracy of weather forecasts is of great significance to daily life and decision-making. As technology develops, we can provide more accurate and reliable weather forecasts by obtaining weather data in real time. In this article, we will learn how to use JavaScript and WebSocket technology to build an efficient real-time weather forecast system. This article will demonstrate the implementation process through specific code examples. We
Simple JavaScript Tutorial: How to Get HTTP Status Code
Jan 05, 2024 pm 06:08 PM
JavaScript tutorial: How to get HTTP status code, specific code examples are required. Preface: In web development, data interaction with the server is often involved. When communicating with the server, we often need to obtain the returned HTTP status code to determine whether the operation is successful, and perform corresponding processing based on different status codes. This article will teach you how to use JavaScript to obtain HTTP status codes and provide some practical code examples. Using XMLHttpRequest
How to use insertBefore in javascript
Nov 24, 2023 am 11:56 AM
Usage: In JavaScript, the insertBefore() method is used to insert a new node in the DOM tree. This method requires two parameters: the new node to be inserted and the reference node (that is, the node where the new node will be inserted).
