js body添加元素 带样式
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function createStyle(){ return"*{padding:0;margin:0;border:0}.loading{width:640px;height:1024px;margin:0 auto}.loadImg{width:640px;height:1024px;animation:fadeInOut 3s linear;-webkit-animation:fadeInOut 3s linear;-moz-animation:fadeInOut 3s linear;opacity:0}@keyframes fadeInOut{0%{opacity:0}25%{opacity:.5}45%{opacity:1}50%{opacity:1}55%{opacity:1}75%{opacity:.5}100%{opacity:0}}@-moz-keyframes fadeInOut{0%{opacity:0}25%{opacity:.5}45%{opacity:1}50%{opacity:1}55%{opacity:1}75%{opacity:.5}100%{opacity:0}}@-webkit-keyframes fadeInOut{0%{opacity:0}25%{opacity:.5}45%{opacity:1}50%{opacity:1}55%{opacity:1}75%{opacity:.5}100%{opacity:0}}" } function addStyle(){ var style = document.createElement("style"); style.type = "text/css"; style.innerhtml = createStyle(); window.document.head.appendChild(style); } function addDom(){ var div = document.createElement("div"); div.className = "loading"; window.document.body.appendChild(div); var img = document.createElement("img"); img.src="img/bg.png"; img.id="loadImg"; img.className="loadImg"; div.appendChild(img); } window.onload=function(){ addStyle(); addDom(); }
感谢https://www.cnblogs.com/cynthia-wuqian/p/5363736.html
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