The use client Directive
A file-level directive that marks the boundary where the tree switches from server to client: the module and everything it imports become part of the client bundle and can use state, effects, and event handlers. The boundary is per-module and transitive, so you place 'use client' on the leaves that need interactivity, not at the top.
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A file-level directive that marks the boundary where the tree switches from server to client: the module and everything it imports become part of the client bundle and can use state, effects, and event handlers. The boundary is per-module and transitive, so you place 'use client' on the leaves that need interactivity, not at the top.
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