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Building Safer JavaScript Applications

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.

Beginner

24 Lessons

Certificate of Completion

AI-POWERED

Explanations

AI-POWERED

Explanations

This course includes

1 Assessment

45 Playgrounds

Course Overview

What You'll Learn

Course Content

Recommendations

Course Overview

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 s...Show More

TAKEAWAY SKILLS

JavaScript

API Development

React.js

HTML elements

SQL

Web API

Web Frameworks

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

Course Content

Introduction

3 Lessons

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

Is JavaScript Secure?

Who is This Course For?

What is the Open Worldwide Application Security Project (OWASP)?

Common Vulnerabilities, Attacks, and Preventions

7 Lessons

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

Cross-Site Scripting (XSS)

The dangerouslySetInnerHTML and createRef Functions

Input Validation

The eval Function

SQL Injection

Vulnerable and Outdated Components

Quiz Yourself on Common Vulnerabilities, Attacks, and Preventions

Sensitive Data Exposure

6 Lessons

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

Cryptography

Error Handling, Logging, and Alerting

JavaScript Can't Keep a Secret

The iframe Element

Quiz Yourself on Sensitive Data Exposure

HTTP and APIs

6 Lessons

Apply your skills to secure HTTP interactions and safeguard API communications.

Authentication and Authorization

Cross-Origin Resource Sharing (CORS)

HTTP Security Headers

Cross-Site Request Forgery (CSRF)

Subresource Integrity (SRI)

Quiz Yourself on HTTP and APIs

JavaScript App Security

Assessment

Conclusion

2 Lessons

Map out the steps for enhancing JavaScript security and utilizing essential tools.

Congratulations!

Appendix

Course Author

Quinton Aiken

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