如何添加过渡效果以缓慢加载页面？

Question

我的页面直接加载非常快，我基本上想要在一些转换持续时间之后加载我的页面。一旦过渡消失，网页就会慢慢加载/出现。

我一直试图解决这个问题很长一段时间，但我不知道如何在Javascript中添加过渡效果。

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<script>
var overlay = document.getElementById("loading");
window.addEventListener('load',function()
{
overlay.style.display = 'none';
})
</script>
 follwoing is css file

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@import url('https://fonts.googleapis.com/css?family=Montserrat');

#loading {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #fff;
  z-index: 9999;
}

.loading-text {
    position: absolute;
    top: 40%;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    text-align: center;
    width: 100%;
    height: auto;
    line-height: 100px;
 
}
.loading-text span {
  display: inline-block;
  margin: 0 5px;
  color: #000;
  font-family: 'Montserrat', sans-serif;
    font-weight:bold;
 
}
.loading-text span:nth-child(1) {
  -webkit-filter: blur(0px);
          filter: blur(0px);
  -webkit-animation: blur-text 1.5s 0s infinite linear alternate;
          animation: blur-text 1.5s 0s infinite linear alternate;
}
.loading-text span:nth-child(2) {
  -webkit-filter: blur(0px);
          filter: blur(0px);
  -webkit-animation: blur-text 1.5s 0.2s infinite linear alternate;
          animation: blur-text 1.5s 0.2s infinite linear alternate;
}
.loading-text span:nth-child(3) {
  -webkit-filter: blur(0px);
          filter: blur(0px);
  -webkit-animation: blur-text 1.5s 0.4s infinite linear alternate;
          animation: blur-text 1.5s 0.4s infinite linear alternate;
}
.loading-text span:nth-child(4) {
  -webkit-filter: blur(0px);
          filter: blur(0px);
  -webkit-animation: blur-text 1.5s 0.6s infinite linear alternate;
          animation: blur-text 1.5s 0.6s infinite linear alternate;
}
.loading-text span:nth-child(5) {
  -webkit-filter: blur(0px);
          filter: blur(0px);
  -webkit-animation: blur-text 1.5s 0.8s infinite linear alternate;
          animation: blur-text 1.5s 0.8s infinite linear alternate;
}
.loading-text span:nth-child(6) {
  -webkit-filter: blur(0px);
          filter: blur(0px);
  -webkit-animation: blur-text 1.5s 1s infinite linear alternate;
          animation: blur-text 1.5s 1s infinite linear alternate;
}
.loading-text span:nth-child(7) {
  -webkit-filter: blur(0px);
          filter: blur(0px);
  -webkit-animation: blur-text 1.5s 1.2s infinite linear alternate;
          animation: blur-text 1.5s 1.2s infinite linear alternate;
}

@-webkit-keyframes blur-text {
  0% {
    -webkit-filter: blur(0px);
            filter: blur(0px);
  }
  100% {
    -webkit-filter: blur(4px);
            filter: blur(4px);
  }
}

@keyframes blur-text {
  0% {
    -webkit-filter: blur(0px);
            filter: blur(0px);
  }
  100% {
    -webkit-filter: blur(4px);
            filter: blur(4px);
  }
}
following is html 

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  <div id="loading">
	<div class="loading-text">
		<span class="loading-text-words">L</span>
		<span class="loading-text-words">O</span>
		<span class="loading-text-words">A</span>
		<span class="loading-text-words">D</span>
		<span class="loading-text-words">I</span>
		<span class="loading-text-words">N</span>
		<span class="loading-text-words">G</span>
	</div></div>

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Answer 1

您可以在开头隐藏内容并使用以下内容显示加载阶段：

#loading {
    display: block;
}

.content { 
    display: none;
}

然后你可以设置你希望看到加载阶段的时间超时，然后淡出加载器并淡入内容。

setTimeout(function(){ 
    $("#loading").fadeOut();
    $(".content").fadeIn(); 
}, 3000);