Nodejs Jest Referenceerror Imported Function - Latest Information & Updates 2026

Web Reference: Dec 7, 2020 · I'm trying to use ES6 modules for my Jest unit tests, so I followed the 2020 updated instructions on making this possible. However, after following those instructions, I get the error ReferenceError: jest is not defined when running my unit test. Jan 16, 2026 · In this guide, we’ll demystify why this error occurs and walk through step-by-step solutions to fix it, ensuring your Jest tests work seamlessly with ES6 modules in a vanilla JS project. Nov 28, 2023 · I'm trying to test an API endpoint by testing its GET function, but when I run Jest, my test fails because Request is apparently not defined. Any help would be greatly appreciated!

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