What Does Lightning Locker Affect?

Find out what’s affected and what’s not affected by Lightning Locker. Lightning Locker enforces security and best practices for custom Lightning components you use in:

• Lightning Experience
• Salesforce mobile app
• Experience Builder sites
• Flows
• Standalone apps that you create (for example, myApp.app) to run in Salesforce Classic or Lightning Experience
• Any other app where you can add a custom Lightning component, such as Salesforce Console in Lightning Experience
• Lightning Out
• Visualforce pages in Salesforce Classic
• Visualforce-based sites

Lightning Locker doesn’t affect environments where you don’t use custom Lightning components.