Lightning Aura Components Developer Guide

Introducing Aura Components
Quick Start
Creating Components
Using Components
Communicating with Events
Communicating Across the DOM with Lightning Message Service
Creating Apps
Styling Apps
Developing Secure Code
Lightning Locker
JavaScript Strict Mode Enforcement
DOM Access Containment
Secure Wrappers
eval() Function is Limited by Lightning Locker
MIME Types Permitted
Access to Supported JavaScript API Framework Methods Only
What Does Lightning Locker Affect?
Lightning Locker Tools
Select the Locker API Version for an Org
Disable Lightning Locker for a Component
Don’t Mix Component API Versions
Lightning Locker Disabled for Unsupported Browsers
Lightning Web Security
Content Security Policy Overview
Using JavaScript
Working with Salesforce Data
Testing Components
Debugging
Performance
Reference
PDF

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Lightning Locker

Lightning Locker is a security architecture for Lightning components. Lightning Locker enhances security by isolating Lightning components that belong to one namespace from components in a different namespace. Lightning Locker also promotes best practices that improve the supportability of your code by only allowing access to supported APIs and eliminating access to non-published framework internals.