[Solved] What will happen if a Cypress plugin tries to access a browser-only API inside the plugin function? — Ans: It will throw a runtime error because plugins run in Node.js, not the browser | Cypress

Cypress - Plugins and Ecosystem

What will happen if a Cypress plugin tries to access a browser-only API inside the plugin function?

AIt will convert the API call to a plugin task automatically

BIt will throw a runtime error because plugins run in Node.js, not the browser

CIt will silently ignore the call and continue

DIt will work normally because Cypress bridges browser and Node.js

Step-by-Step Solution

Solution:

Step 1: Identify the environment plugins run in
Cypress plugins run in Node.js, which does not have browser APIs like window or document.
Step 2: Understand consequences of accessing browser-only APIs in plugins
Trying to use browser APIs in plugins causes runtime errors because those APIs are undefined in Node.js.
Final Answer:
It will throw a runtime error because plugins run in Node.js, not the browser -> Option B
Quick Check:
Plugin environment = Node.js, no browser APIs [OK]

Quick Trick: Plugins run in Node.js, not browser [OK]

Common Mistakes:

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