Lightning Locker
Lightning Locker is a security architecture for Lightning components. It provides component isolation and security that allows code from many sources to execute and interact using safe, standard APIs and event mechanisms.
In Spring ’22, Salesforce introduced Lightning Web Security (LWS), a new architecture designed to make it easier for your components to use secure coding practices. LWS is enabled by default for all orgs created in Winter ’23 and later. As of Summer ’23, LWS for Lightning web components and Aura components is generally available for all orgs.
Lightning Locker remains the default Lightning component security architecture in orgs created before Winter ’23. Unless LWS is enabled instead, Lightning Locker is enabled by default for all Lightning components on API version 39.0 and later, and you can’t disable Lightning Locker for these components.
If possible, we recommend that you enable LWS instead of remaining on Lightning Locker. First test LWS in a sandbox environment, and then in production. For a comparison of the features that LWS and Lightning Locker support, see How Lightning Web Security Compares to Lightning Locker.
See Also
This release is in preview. Features described here don't become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can't guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.
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