js定时器倒计时不流畅

let count = 10;
function countdown() {
    if (count > 0) {
        console.log(count);
        count--;
        requestAnimationFrame(countdown);
    }
}
countdown();

let count = 10;
function countdown() {
    if (count > 0) {
        console.log(count);
        count--;
        setTimeout(countdown, 1000); // 使用setTimeout代替setInterval
    }
}
countdown();

// 主线程
const worker = new Worker('worker.js');
worker.onmessage = function(event) {
    console.log(event.data);
};

// worker.js
let count = 10;
function countdown() {
    if (count > 0) {
        postMessage(count);
        count--;
        setTimeout(countdown, 1000);
    }
}
countdown();

let count = 10;
let lastTime = Date.now();
function countdown() {
    const now = Date.now();
    const elapsed = now - lastTime;
    if (elapsed >= 1000) {
        console.log(count);
        count--;
        lastTime = now;
    }
    if (count > 0) {
        requestAnimationFrame(countdown);
    }
}
countdown();