Calculate the distance of the camera to fit a given width

distanceCameraBasedOnWidth.js

import { MathUtils } from "three";

export default function distance(width, camera) {
  const vFOV = MathUtils.degToRad(camera.fov);
  const distance = width / camera.aspect / (2 * Math.tan(vFOV / 2));
  const heightPlane = 2 * Math.tan(vFOV / 2) * distance;
  return { distance, height: heightPlane };
}