Challenge 1 of 7
Resolve a value
Instructions
Write `ok()` that returns a Promise resolving to `"ready"`.
Editor
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Module 1 of 1
promises
Create promises, chain then/catch, and wait with async/await.
Async JavaScript · 0/7 completed · scroll down for every challenge
Challenge 2 of 7 · Then transform
Challenge 2 of 7
Then transform
Instructions
Write `doubleAsync(n)` that resolves n, then doubles it with `.then`.
Editor
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Challenge 3 of 7 · Catch error
Challenge 3 of 7
Catch error
Instructions
Write `safe()` that rejects with `"nope"` and returns `"fallback"` via `.catch`.
Editor
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Challenge 4 of 7 · Async function
Challenge 4 of 7
Async function
Instructions
Write `async greet()` that returns `"hi"` (use async/await or return the string).
Editor
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Challenge 5 of 7 · Await a promise
Challenge 5 of 7
Await a promise
Instructions
Write `async load()` that awaits `Promise.resolve(7)` and returns that number.
Editor
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Challenge 6 of 7 · Promise.all
Challenge 6 of 7
Promise.all
Instructions
Write `async total()` that awaits `Promise.all` of 2 and 3, then returns their sum.
Editor
IntelliSense on
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Challenge 7 of 7 · Map async
Challenge 7 of 7
Map async
Instructions
Write `async doubleAll(nums)` that maps each number to a resolved double and uses Promise.all.
Editor
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