@threlte/xr/dist/internal/setupRaf.js

Tools to more easily create VR and AR experiences with Threlte

import { onDestroy } from 'svelte';
// @ts-expect-error untyped internal import, when have you ever done me wrong?
import { raf } from 'svelte/internal/client';
import { watch } from '@threlte/core';
import { session } from './stores';
export const setupRaf = () => {
    if (typeof window === 'undefined')
        return;
    const originalTick = raf.tick;
    watch(session, (session) => {
        raf.tick =
            session === undefined
                ? originalTick
                : (fn) => session.requestAnimationFrame(fn);
    });
    onDestroy(() => (raf.tick = originalTick));
};