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Recommended: JavaScript SDK with React Hooks

For new React apps, we recommend the JavaScript SDK with React Hooks (@dynamic-labs-sdk/react-hooks) instead of the legacy React SDK documented here. The JS SDK comes with many benefits such as a much smaller bundle size and other optimizations. Use the React quickstart (JavaScript SDK) to get started.
Returns the Dynamic-issued JWT (access token) from localStorage, or undefined if the user is not logged in. For JWT structure, backend verification, and security guidance, see Tokens.
Last modified on June 25, 2026