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Frontend · Junior · Theory

What is CORS, and why does the browser block a request to an API on a different domain?

~4 min by voice

How to approach it

This checks whether the candidate understands where a CORS error comes from: the browser enforces the Same-Origin Policy, and the server can relax it through headers. It's important to distinguish 'the browser won't let JS read the response' from 'the server rejected the request'.

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Topics
corsbrowser network
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Answer by voice

The interviewer will ask this question and listen. Think out loud and ask for a hint if you need one. When you're done, pause or tap “That's my answer”. In about a minute, your score and the points you covered show up here.

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Best with headphones · ~4 min