.agents/skills/remotion-best-practices/rules/measuring-dom-nodes.md

name	description	metadata
measuring-dom-nodes	Measuring DOM element dimensions in Remotion	tags measure, layout, dimensions, getBoundingClientRect, scale

Measuring DOM nodes in Remotion

Remotion applies a scale() transform to the video container, which affects values from getBoundingClientRect(). Use useCurrentScale() to get correct measurements.

Measuring element dimensions

import { useCurrentScale } from "remotion";
import { useRef, useEffect, useState } from "react";

export const MyComponent = () => {
  const ref = useRef<HTMLDivElement>(null);
  const scale = useCurrentScale();
  const [dimensions, setDimensions] = useState({ width: 0, height: 0 });

  useEffect(() => {
    if (!ref.current) return;
    const rect = ref.current.getBoundingClientRect();
    setDimensions({
      width: rect.width / scale,
      height: rect.height / scale,
    });
  }, [scale]);

  return <div ref={ref}>Content to measure</div>;
};