Information about JavaScript is scattered across the web, so I compiled this guide for reference.

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JavaScript Security: Simple Practices to Secure Your Frontend

I don't know about you, but I started my career as a front-end developer working in a small agency, where no one cared about security. When I changed to work with bigger projects in bigger companies I kept not caring about security because no one had taught me better,

Understanding how to secure your JavaScript code can change that and help us to protect our applications and users.

This article will explore some security practices that couldn’t hurt JavaScript developers to implement whenever they make sense.

Some of the topics above I learned while studying the topic, but there are more ways to make your code safe. I am just sharing some simple ones to get you started..

P.S. Yes, I asked questions to an AI and asked it to help me with examples.

P.S.2 Yes, IA created the cover image as I know my weaknesses LOL

Outdated libraries can expose your applications to security vulnerabilities. Keeping everything up-to-date helps you avoid known issues that have already been fixed. npm (Node Package Manager)

is a great tool that helps you manage and update your libraries.

Regular Checks: Run npm outdated to see which packages are outdated.

Update Regularly: Use npm update to upgrade your packages to the latest versions.

Automate Security Updates: Tools like npm audit identify and suggest fixes for security vulnerabilities.

npm audit fix # Fixes packages with known vulnerabilities

Security headers tell the browser how to behave when handling your site's content, which helps prevent some types of attacks like cross-site scripting and data injection. Content Security Policy (CSP)

, a security header that helps stop unauthorized scripts from running on your site, which can prevent many attacks.

More Details

There are a few more points worth noting. First, browser compatibility varies across different browsers. Second, performance optimization is crucial when handling large amounts of data. Finally, key management is also an important consideration.

This article was first published on JSVMP Blog. Reposting with attribution is welcome.

Reference: JavaScript Security: Simple Practices to Secure Your Frontend - DEV Community

While working on frontend security projects, I encountered The - here's what I learned.

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Scripts that are supposed to tell bots and real users apart or at least help in this process. These use cases profit from every level of obfuscation.

In modern web development, The has become increasingly important. Developers need to understand the security implications and best practices.

When implementing The, there are several key considerations. First, performance optimization is crucial. Second, security must be addressed at every layer.

Many developers overlook the importance of proper error handling and debugging techniques.

The ecosystem around The continues to evolve rapidly. New libraries and frameworks emerge regularly.

Testing is another critical aspect that shouldn't be neglected.

More Details

There are a few more points worth noting. First, browser compatibility varies across different browsers. Second, performance optimization is crucial when handling large amounts of data. Finally, key management is also an important consideration.

Due to length constraints, I'll wrap up here. More practical examples coming soon. Leave a comment if you have questions!

Reference: The Secret Guide To Virtualization Obfuscation In JavaScript - Reddit

不少同学在群里讨论How，这里统一回复一下，顺便整理成文章。

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如何保护JavaScript应用程序：常见漏洞和最佳实践

JavaScript是用于创建客户端和服务器端应用程序的广泛使用的编程语言。其用例超越了Web开发，因为JavaScript也用于移动应用程序开发和人工智能。这使得JavaScript成为一种多功能语言。

但是，这种多功能性带来了风险。JavaScript的广泛使用也使其成为攻击的主要目标。

只有人类为他们的家庭开发了复杂的安全系统，例如监控摄像头和数字锁，开发人员同样必须保护他们的应用程序免受网络攻击和外部威胁。

本文将向您介绍应用程序中安全性的重要性。我们还将讨论常见的JavaScript安全漏洞以及如何防止攻击和保护您的JavaScript代码。

了解常见的JavaScript安全漏洞

保护JavaScript应用程序的最佳做法

如今，在构建项目时，大多数开发人员只专注于使应用程序正常工作并复制所需的功能。安全往往没有得到优先考虑，这导致近年来出现了重大问题。

许多公司受到安全攻击的影响，导致收入损失，敏感用户信息暴露，公司信誉受损。一个真实世界的例子完美地说明了这种情况，

2022年，以生产两轮电动滑板车而闻名的赛格威

攻击，其中用户的敏感支付信息暴露给攻击者。赛格威Magecart攻击是一个众所周知的例子，

攻击者能够通过注入操纵Web浏览器中运行的代码的脚本来窃取用户的信息，从而允许他们访问用户网页上输入的数据。

Segway攻击利用了一个主要的JavaScript漏洞，即JavaScript执行客户端代码的能力。这使得恶意脚本更容易在用户的浏览器中注入和执行。

为了防止您的应用程序受到攻击者的危害，重要的是要了解JavaScript的漏洞，攻击者如何利用这些漏洞，然后学习如何保护您的应用程序。

了解常见的JavaScript安全漏洞

更多内容

除了上面提到的内容，还有几个点值得注意。首先是浏览器的兼容性，不同浏览器对Web Crypto API的支持程度有所不同。其次是性能问题，加密操作在大量数据时可能会影响用户体验。最后是密钥管理，如何安全地存储和传输密钥也是一个需要考虑的问题。

篇幅原因就先写这么多，后面有空会再补充更多实战案例。有问题评论区见。

Reference: How to Secure JavaScript Applications: Common Vulnerabilities and ...