Throttle in JavaScript

Lets one call through per interval and drops the rest, which is what a scroll handler wants.

function throttle(fn, limit) {
  let ready = true;
  return function (...args) {
    if (!ready) return;
    ready = false;
    fn.apply(this, args);
    setTimeout(() => {
      ready = true;
    }, limit);
  };
}

Keywords and builtins used here

• function
• if
• let
• return
• this

The run, in numbers

Lines

11

Characters to type

182

Tokens

58

Three-star pace

105 tpm

At the three-star pace of 105 tokens a minute, this run takes about 33 seconds.

Type this snippet

Step 5 of 5 in Composing functions, step 9 of 16 in Functions & patterns.

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