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This article mainly introduces the shortcomings of javascript, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

The disadvantages of javascript are: 1, low security, will be used by hackers to execute malicious code on the user's computer; 2, different browser vendors support JavaScript, js code will be presented in different ways on different devices, resulting in inconsistent display effect. The operating environment of this tutorial: windows7 system, javascript1.8.5 version, Dell G3 computer.

JavaScript is one of the most popular programming languages in the world, with a history of more than 20 years, 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 the functionality of websites to running games and web-based software.

JavaScript is an object-based (Object) and event-driven (Event Driven) client scripting language with relative security. At the same time, it is also a scripting language widely used in client-side Web development, which is often used to add dynamic functions to HTML pages, such as responding to various actions of users. Originally designed by Brendan Eich of Netscape, it is a dynamic, weakly typed, prototype-based language with built-in support for classes.

Advantages of JavaScript

JavaScript has many advantages, and several benefits of using JavaScript include:

You don't need a compiler because web browsers use HTML to interpret it

It is easier to learn than other programming languages

Mistakes are easier to find and therefore easier to correct

It can be assigned to a specific page element or to a specific event, such as a click or mouse hover

JS can work across multiple browsers, platforms, etc.

You can use JavaScript 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 lighter than other programming languages

The weakness of JavaScript

Every programming language has its weaknesses, and part of the problem is that when a programming language becomes as popular as JavaScript, hackers, liars, and other malicious third parties have an additional incentive to look for vulnerabilities and security vulnerabilities. Some of the disadvantages of JavaScript include:

1. Low security and vulnerability to attack

Can be used to execute malicious code on a user's computer

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

2. JS code snippet is quite large, and different browser vendors support JavaScript, which will be presented in different ways on different devices, resulting in inconsistent display results.

At present, there are many browsers on the Internet, such as Firefox, Internet Explorer, Opera, etc., but the degree to which each browser supports JavaScript is different. When different browsers browse a home page with JavaScript scripts, due to the slightly different support for JavaScript, the effect will be different, sometimes even can not be displayed.

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