如何在Javascript中同时平滑地滚动X和Y

function smoothScrollTo(x, y, duration) {
    const startX = window.scrollX;
    const startY = window.scrollY;
    const distanceX = x - startX;
    const distanceY = y - startY;
    let startTime = null;

    function animation(currentTime) {
        if (startTime === null) startTime = currentTime;
        const timeElapsed = currentTime - startTime;
        const run = ease(timeElapsed, startX, distanceX, duration);
        const rise = ease(timeElapsed, startY, distanceY, duration);
        window.scrollTo(run, rise);
        if (timeElapsed < duration) requestAnimationFrame(animation);
    }

    function ease(t, b, c, d) {
        t /= d / 2;
        if (t < 1) return c / 2 * t * t + b;
        t--;
        return -c / 2 * (t * (t - 2) - 1) + b;
    }

    requestAnimationFrame(animation);
}

// 使用示例
smoothScrollTo(500, 300, 1000); // 滚动到X=500, Y=300的位置，持续时间为1000毫秒