Error1 reports
Fix TypeError
in Cypress
✅ Solution
This "TypeError: _.map is not a function" in Cypress often occurs when a Cypress configuration file (cypress.config.js/ts) or a plugin file is attempting to use the Lodash `map` function on a variable that is not an array (e.g., it's undefined, a single value, or an object). Ensure the variable you are trying to map over is indeed an array; if it's coming from a configuration property, verify that the property is correctly defined and returning an array. You may need to initialize the variable or handle cases where it might be undefined or not an array before attempting to map over it.
Related Issues
Real GitHub issues where developers encountered this error:
Timeline
First reported:Jan 7, 2026
Last reported:Jan 7, 2026