Enhance JavaScript Security with Content Security Policies

Enhance JavaScript Security with Content Security Policies

As the name suggests, CSP is a set of instructions you can send with your JavaScript code to the browser to control its execution. For example, you can set up a CSP to restrict the execution of JavaScript to a set of whitelisted domains and ignore any inline scripts and event handlers to protect from XSS attacks.

How confident you feel that your JavaScript code is secured against the attackers? And why should you be concerned with it? When we look at modern web applications, one thing common is that they all use JavaScript. In some applications, JavaScript spreads its dominance contributing to the larger portion of code. One of the important properties of JavaScript is that the code we write executes in the user's browser where we have limited access.

Though we have minimal control over the execution environment, it's vital to ensure the security of JavaScript and have control over the execution happening there.

Do you know whether you can instruct the browser to comply with a set of guidelines and execute your JavaScript code?

After reading this article, you’ll come to know the common attributes of Content Security Policies and how you can use them to secure your JavaScript code at runtime.

Content Security Policy

Content Security Policy (CSP) is an added layer of security that helps to detect and mitigate certain types of attacks, including Cross Site Scripting (XSS) and data injection attacks. These attacks are used for everything from data theft to site defacement to distribution of malware.

As the name suggests, CSP is a set of instructions you can send with your JavaScript code to the browser to control its execution. For example, you can set up a CSP to restrict the execution of JavaScript to a set of whitelisted domains and ignore any inline scripts and event handlers to protect from XSS attacks. In addition, you can specify that all the scripts should load via HTTPS to reduce the risk of packet sniffing attacks.

content-security-policy security web-development javascript frontend

Bootstrap 5 Complete Course with Examples

Bootstrap 5 Tutorial - Bootstrap 5 Crash Course for Beginners

Nest.JS Tutorial for Beginners

Hello Vue 3: A First Look at Vue 3 and the Composition API

Building a simple Applications with Vue 3

Deno Crash Course: Explore Deno and Create a full REST API with Deno

How to Build a Real-time Chat App with Deno and WebSockets

Convert HTML to Markdown Online

HTML entity encoder decoder Online

Hire Frontend Developers

Create a new web app or revamp your existing website? Every existing website or a web application that we see with an interactive and user-friendly interface are from Front-End developers who ensure that all visual effects come into existence....

How long does it take to develop/build an app?

This article covers A-Z about the mobile and web app development process and answers your question on how long does it take to develop/build an app.

Why Web Development is Important for your Business

With the rapid development in technology, the old ways to do business have changed completely. A lot more advanced and developed ways are ...

Important Reasons to Hire a Professional Web Development Company

    You name the business and I will tell you how web development can help you promote your business. If it is a startup or you seeking some...

How To Develop And Deploy Micro-Frontends Using Single-Spa Framework

In this article, we're going to develop an app composed of micro-frontends using single-spa and deploy it to Heroku. We'll set up continuous integration using Travis CI. Each CI pipeline will bundle the JavaScript for a micro-frontend app and then upload the resulting build artifacts to AWS S3.