ts-loop base on setTimeout

loop.worker.ts

export const fps: number = 10;
export const interval = fps > 0 ? 1000 / fps : 1000 / 30;

function _run(current: number, delta: number) {
    console.log(`_run at ${current} + delta: ${delta}`);

    // TODO do something here.
    for(let i=0; i< 499999 ;++i){
        let a = new Date().getTime() + i;
    }
}

function update(current: number, delta: number = 0) {
    _run(current, delta);

    const now: number = new Date().getTime();
    const run_time: number = now - current;

    if (run_time >= interval) {
        // I am late.
        console.log(`Update late.  run_time: ${run_time} `);
        update(now, run_time);
    } else{
        console.log(`${interval - run_time}`);
        setTimeout(() => {
            const when: number = new Date().getTime();
            update(when, when - now);

        }, interval - run_time)
    }
}

update(new Date().getTime());