Sleep and timeout in JavaScript

A promise that resolves after a delay, plus the timeout that races against it.

const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));

async function withTimeout(promise, ms) {
  const timeout = sleep(ms).then(() => {
    throw new Error(`timed out after ${ms}ms`);
  });
  return Promise.race([promise, timeout]);
}

Keywords and builtins used here

• Promise
• async
• const
• function
• return
• throw

The run, in numbers

Lines

8

Characters to type

245

Tokens

74

Three-star pace

105 tpm

At the three-star pace of 105 tokens a minute, this run takes about 42 seconds.

Type this snippet

Step 3 of 3 in Scheduling, step 14 of 19 in Promises & async.

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