The useIsExtension() hook returns whether the handshake has been successfully established with the Replit workspace. If the handshake is loading, undefined will be returned. After loading has finished, the hook will return a boolean.
useIsExtension()
undefined
import { useIsExtension } from '@replit/extensions-react'; const Component = () => { const isExtension = useIsExtension(); ... }
function useIsExtension(): boolean | undefined;
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