[Solved] Why must custom plugin tasks always return a value or a promise? — Ans: To ensure Cypress waits for task completion before continuing tests | Cypress

Cypress - Plugins and Ecosystem

Why must custom plugin tasks always return a value or a promise?

ATo ensure Cypress waits for task completion before continuing tests

BBecause tasks run in the browser and need return values for UI updates

CTo prevent syntax errors in the plugin file

DBecause Cypress ignores tasks without return values silently

Step-by-Step Solution

Solution:

Step 1: Understand Cypress task execution model
Tasks run in Node process; Cypress waits for returned value or promise before continuing.
Step 2: Eliminate incorrect options
Tasks do not run in the browser. Syntax errors are unrelated to return values. Cypress does not ignore tasks silently; it fails if no return.
Final Answer:
To ensure Cypress waits for task completion before continuing tests -> Option A
Quick Check:
Return value/promise ensures Cypress waits [OK]

Quick Trick: Return value or promise so Cypress waits for task [OK]

Common Mistakes:

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Why must custom plugin tasks always return a value or a promise?