Typed debounce in TypeScript

Debounce with the wrapped function's argument types preserved.

function debounce<A extends unknown[]>(
  fn: (...args: A) => void,
  wait: number,
): (...args: A) => void {
  let timer: ReturnType<typeof setTimeout> | undefined;
  return (...args: A) => {
    clearTimeout(timer);
    timer = setTimeout(() => fn(...args), wait);
  };
}

Keywords and builtins used here

• A
• ReturnType
• extends
• function
• let
• number
• return

The run, in numbers

Lines

10

Characters to type

255

Tokens

77

Three-star pace

105 tpm

At the three-star pace of 105 tokens a minute, this run takes about 44 seconds.

Type this snippet

Step 2 of 5 in Timing & memory, step 15 of 19 in Classes & patterns.

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