What are the disadvantages of javascript

The disadvantages of JavaScript are: 1. Low security and can be used by hackers to execute malicious code on the user's computer; 2. Each browser manufacturer has different levels of support for JavaScript, and js code runs on different devices. will be presented in different ways, resulting in inconsistent display results.

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

JavaScript is one of the most popular programming languages ​​in the world, with more than two decades of history, and it is also one of the three main languages ​​used by web developers. JavaScript can be used for a variety of purposes, from enhancing website functionality to running games and web-based software.

JavaScript is a client-side scripting language that is based on Object and Event Driven and is relatively safe. It is also a scripting language widely used in client-side web development. It is often used to add dynamic functions to HTML web pages, such as responding to various user operations. Originally designed by Brendan Eich at Netscape, it is a dynamic, weakly typed, prototype-based language with built-in support classes.

Advantages of JavaScript

JavaScript has many advantages. Several benefits of using JavaScript include:

• You don't need a compiler because web browsers interpret it using HTML;

• It is easier to learn than other programming languages;

• Errors are easier to spot and therefore easier to correct;

• It can be assigned to a specific web page element or a specific event, such as a click or mouseover;

• JS works across multiple browsers, platforms, etc.;

• JavaScript can be used to validate input and reduce the need for manual data checking;

• Make the website more interactive and attract the attention of visitors;

• It is faster and more lightweight than other programming languages;

Weaknesses of JavaScript

Every programming language has weaknesses, and part of the problem is that when a programming language becomes as popular as JavaScript When this happens, hackers, scammers, and other malicious third parties will have additional incentives to find vulnerabilities and security vulnerabilities. Some disadvantages of JavaScript include:

1. Low security and vulnerable to attacks ;

can be used to execute malicious code on the user's computer;

js code will be executed on the user's computer. In many cases, this can result in opening a door for hackers. This is actually one of the reasons some people disable JavaScript when browsing the internet.

2. The JS code segment is quite large, and each browser manufacturer has different support for JavaScript. It will be presented in different ways on different devices, resulting in inconsistent display effects.

Currently there are many browsers on the Internet, such as Firefox, Internet Explorer, Opera, etc., but each browser supports JavaScript to a different extent. Different browsers are browsing a JavaScript script. On the homepage, due to slightly different support for JavaScript, there will be a certain gap in the effect, and sometimes it may not even be displayed.

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