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recordAnimationFrames javascript Code Snippet in 2023

browserrecursionintermediate

Last Updated: 28 January 2023

Invokes the provided callback on each animation frame.

  • Use recursion.
  • Provided that running is true, continue invoking Window.requestAnimationFrame() which invokes the provided callback.
  • Return an object with two methods start and stop to allow manual control of the recording.
  • Omit the second argument, autoStart, to implicitly call start when the function is invoked.
const recordAnimationFrames = (callback, autoStart = true) => { let running = false, raf; const stop = () => { if (!running) return; running = false; cancelAnimationFrame(raf); }; const start = () => { if (running) return; running = true; run(); }; const run = () => { raf = requestAnimationFrame(() => { callback(); if (running) run(); }); }; if (autoStart) start(); return { start, stop }; };
const cb = () => console.log('Animation frame fired'); const recorder = recordAnimationFrames(cb); // logs 'Animation frame fired' on each animation frame recorder.stop(); // stops logging recorder.start(); // starts again const recorder2 = recordAnimationFrames(cb, false); // `start` needs to be explicitly called to begin recording frames

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