单dom节点实现轮播

利用backgroundImage可以添加多张图片，以及位置偏移实现轮播效果

• 创建一个div；并用backgroundImage给div附图片
• 利用backgroundPosition调节位置
• 利用css3 transition调节过渡
• 即可替代简单的图片切换

/** * 播放图片 */ function playImage(src) { if (animaitionFinshed) return; if (!_imageEl) { _imageEl = document.createElement('div') _imageEl.className = `swiper_container`; _imageEl.style.backgroundImage = `url(${src.url})`; _imageEl.setAttribute("data-img", src.url); elContainer.appendChild(_imageEl); } else { animaitionFinshed = true; let width = elContainer.clientWidth, height = elContainer.clientHeight; let preImage = _imageEl.getAttribute("data-img"); _imageEl.style.backgroundImage = `url(${preImage}),url(${src.url}) `; _imageEl.style.backgroundPositionX = `center,${width + 20}px`; setTimeout(() => { _imageEl.style.transition = "all 0.8s ease"; _imageEl.style.backgroundPositionX = `-${width + 20}px,center`; }, 0); setTimeout(() => { _imageEl.style.transition = "none"; _imageEl.style.backgroundImage = `url(${src.url}) `; _imageEl.style.backgroundPositionX = `center`; _imageEl.setAttribute("data-img", src.url) animaitionFinshed = false; }, 800) } }

源代码

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