如何在颤动中进行跟随按钮的设计

// 示例代码：平滑移动按钮
function smoothMove(button, targetPosition, duration) {
    let startPosition = button.getBoundingClientRect();
    let distance = targetPosition - startPosition.left;
    let startTime = null;

    function animation(currentTime) {
        if (startTime === null) startTime = currentTime;
        let timeElapsed = currentTime - startTime;
        let run = ease(timeElapsed, startPosition.left, distance, duration);
        button.style.left = run + 'px';
        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);
}

// 示例代码：扩大按钮点击区域
function expandClickArea(button, padding) {
    let rect = button.getBoundingClientRect();
    let newRect = {
        top: rect.top - padding,
        right: rect.right + padding,
        bottom: rect.bottom + padding,
        left: rect.left - padding
    };
    button.style.position = 'absolute';
    button.style.top = newRect.top + 'px';
    button.style.left = newRect.left + 'px';
    button.style.width = (newRect.right - newRect.left) + 'px';
    button.style.height = (newRect.bottom - newRect.top) + 'px';
}