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Updated 5 months ago

Building Safer JavaScript Applications
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Explore JavaScript web application security to mitigate vulnerabilities, handle user input, securely store and transmit data, and understand HTTP and API security. Gain insights for interviews and practice assessments.
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JavaScript is one of the most popular and in-demand programming languages today and its usage shows no signs of slowing down. If you use JavaScript for either the backend or frontend, it is crucial to have a firm understanding of web application security in order to keep our users safe. In this course, you’ll learn how to mitigate the most common JavaScript vulnerabilities and attacks. For example, you will learn why user-provided input should be treated with caution. Then, you’ll see how to safely store sensitive data on the client and the server, and how to securely transmit it across the internet. Finally, after learning about HTTP and API security, you can take an in-depth assessment to test what you've learned. Questions about web application security often come up in interviews since knowing security principles is a sign of a mature developer. Should input validation happen on the client or the server? Take this course to find out!
JavaScript is one of the most popular and in-demand programming languages today and its usage shows no signs of slowing down. If...Show More

WHAT YOU'LL LEARN

A deep understanding of properly handling user-provided data
The ability to prevent common attacks like XSS, SQL injection, CSRF and clickjacking
Working knowledge of how to store and transmit sensitive data
Familiarity with HTTP and API security best practices
Hands-on experience using modern security techniques including Content Security Policy (CSP) and Subresource Integrity (SRI)
A deep understanding of properly handling user-provided data

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TAKEAWAY SKILLS

JavaScript

API Development

React.js

HTML elements

SQL

Web API

Web Frameworks

Content

1.

Introduction

3 Lessons

Get familiar with JavaScript security, its challenges, and OWASP principles for web applications.

2.

Common Vulnerabilities, Attacks, and Preventions

7 Lessons

Unpack the core of preventing JavaScript vulnerabilities like XSS, SQL injection, and outdated components.

3.

Sensitive Data Exposure

6 Lessons

Examine techniques to safeguard sensitive data, from encryption to secure handling of cookies and iframes.

5.

Conclusion

2 Lessons

Map out the steps for enhancing JavaScript security and utilizing essential tools.
Certificate of Completion
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Course Author:

Developed by MAANG Engineers
Every Educative resource is designed by our team of ex-MAANG software engineers and PhD computer science educators — subject matter experts who’ve shipped production code at scale and taught the theory behind it. The goal is to get you hands-on with the skills you need to stay ahead in today's constantly evolving tech landscape. No videos, no fluff — just interactive, project-based learning with personalized feedback that adapts to your goals and experience.

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