scrollSmoothToPosition

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// 页面垂直平滑滚动到指定滚动高度 const scrollSmoothTo = (position) => {     if (!window.requestAnimationFrame) {         window.requestAnimationFrame = function(callback, element) {             return setTimeout(callback, 17);         };     }     // 当前滚动高度     let scrollTop = document.documentElement.scrollTop || document.body.scrollTop;     // 滚动step方法     const step = () => {         // 距离目标滚动距离         let distance = position - scrollTop;         // 目标滚动位置         scrollTop = scrollTop + distance / 5;         if (Math.abs(distance) < 1) {             window.scrollTo(0, position);         } else {             window.scrollTo(0, scrollTop);             requestAnimationFrame(step);         }     };     step(); };

　　

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// IOS 兼容性不好 window.scrollTo({     top: number,     behavior: 'smooth', });