Restricted Access to Salesforce Global Variables

Lightning Locker blocks access to some global JavaScript objects that are available to other Salesforce features.

Lightning web components (LWC) don’t have access to:

  • $A
  • Aura
  • Sfdc
  • sforce

Locker restricts access to these objects for Lightning web components because they are either deprecated or can lead to cross-framework dependencies.

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Lightning Web Security (LWS)
Lightning Locker
What Does Lightning Locker Affect?
DOM Access Containment
How Lightning Locker Uses the Proxy Object
Secure Wrappers
Lightning Locker Tools
eval() Function Is Limited by Lightning Locker
MIME Types Permitted
Third-Party Web Components With Lightning Locker
Salesforce Global Variables
Unsupported Browsers
Arrays Proxied When Passed to Child Components
querySelector APIs With Lightning Locker
Select the Locker API Version for an Org
Disable Lightning Locker for an Aura Component
Access to Supported JavaScript API Framework Methods Only
Content Security Policy (CSP)
JavaScript Strict Mode Enforcement