Fix JavaScript ReferenceError: fetch is not defined (2025 Guide)
Fix ReferenceError: fetch is not defined in JavaScript - 2025 Guide Fix ReferenceError: fetch is not defined in JavaScript - 2025 Guide Posted on: March 24, 2025 Getting a "ReferenceError: fetch is not defined" in JavaScript? It’s because fetch isn’t available in Node.js by default. Let’s fix it fast in this 2025 guide! What Causes "ReferenceError: fetch is not defined"? This error occurs when you use the fetch API in Node.js, where it’s not natively supported (prior to Node.js 18). Common causes: Node.js Environment : fetch is a browser API, not part of older Node.js core. Missing Library : No external fetch implementation installed. Environment Confusion : Mixing browser and Node.js code. Test this locally (create main.js and run node main.js ):...