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
Lightning Locker API Viewer
Locker Console Overview
Evaluate JavaScript Code Compatibility with Lightning Locker
Benchmark Lightning Locker Effect on JavaScript Code
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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Locker Console Overview

Use Locker Console to check your JavaScript code’s compatibility with Lightning Locker, and compare how it runs with Lightning Locker enabled and disabled.

Access Locker Console in the Component Library.

Locker Console enables you to quickly evaluate JavaScript code for issues or benchmark code, without requiring you to create an app to test your component. You can evaluate only JavaScript code in Locker Console. You can't evaluate a complete component bundle or component markup.

Here's an overview of the user interface of the Locker Console tool.

Locker Console functionality
Code Console (1)
Paste or type your JavaScript code here to evaluate or benchmark it.
Toggles (2)
  • Enable or disable Locker.
  • Enable or disable Strict CSP.
Actions (3)
  • Click Evaluate to run the code that’s displayed in the code console.
  • Click Benchmark to run your code with and without Lightning Locker and view relative performance metrics.
  • Click Clear Results to clear all the displayed results.