@oslojs/jwt

A JavaScript library for parsing and encoding JSON web tokens (JWT) by Oslo. Only signed tokens are supported.

• Runtime-agnostic
• No third-party dependencies
• Fully typed

import { parseJWT, JWSRegisteredHeaders, JWTRegisteredClaims, joseAlgorithmHS256 } from "@oslojs/jwt";  const [header, payload, signature] = parseJWT(jwt); const headerParameters = new JWSRegisteredHeaders(header); if (headerParameters.algorithm() !== joseAlgorithmHS256) { throw new Error("Unsupported algorithm"); } const claims = new JWTRegisteredClaims(payload); if (!claims.verifyExpiration()) { throw new Error("Expired token"); } if (claims.hasNotBefore() && !claims.verifyNotBefore()) { throw new Error("Invalid token"); } 

Installation

npm i @oslojs/jwt