Lightning Aura Components Developer Guide

What Is the Lightning Component Framework?
Quick Start
Creating Components
Using Components
Communicating with Events
Communicating Across the DOM with Lightning Message Service
Creating Apps
Styling Apps
Developing Secure Code
What is Lightning Locker?
Content Security Policy Overview
Using JavaScript
Working with Salesforce Data
Testing Components with Lightning Testing Service
Debugging
Performance
Reference
PDF

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Developing Secure Code

The Lightning Locker architectural layer enhances security by isolating individual Lightning namespaces in their own containers and enforcing coding best practices.

The framework also uses JavaScript Strict mode to turn on native security features in the browser, and Content Security Policy (CSP) rules to control the source of content that can be loaded on a page.