Async in JavaScript: interview exercises

Async in JavaScript: 4 test-checked interview exercises (Fetch in parallel, Retry a failing call), each beside a worked example, with tests as you go. Free.

1. Fetch in parallel
2. Retry a failing call
3. Run tasks one at a time
4. Add a timeout to a promise

Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Progress is saved in your browser, and in your account if you sign in.

More JavaScript topics

• Strings
• Arrays
• Objects
• Functions
• Practical

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