js ajax加载时的进度条代码

在web页面中使用ajax加载进度条，可以让用户预先判断等待的时间，而且还可以减少用户等待信息加载过程中的心理焦虑感，所以进度条加载必不可少，下面小编给大家介绍ajax加载进度条代码是如何实现的

最终效果如下图所示，pc和移动端都可以展示的，调用方法也很简单，开始调用：loading.baosight.showPageLoadingMsg(false),alse代表不现实加载说明,true展示加载说明.调用完成后调用:loading.baosight.hidePageLoadingMsg(),在整个代码里有两个文件，一个是js文件，一个是css文件。切记不要忘记引入jquery.js

css文件

#_loadMsg{
 display: inline-block;
 width: 100%;
 text-align: center;
 line-height: 45;
 padding-left: 20px;
 display : none;
}

#_loading_p {
 vertical-align: middle;
 display: inline-block;
 width: 100%;
 height: 100%;
 margin: 0 auto;
 text-align: center;
 position: absolute;
 z-index: 3;
 line-height: 40;
 opacity: 0.5;
 display : none;
 background: #CCCCCC;
}

#_loading_p span {
 display: inline-block;
 width: 10px;
 height: 40px;
 animation-name: scale;
 -webkit-animation-name: scale;
 -moz-animation-name: scale;
 -ms-animation-name: scale;
 -o-animation-name: scale;
 animation-duration: 1.2s;
 -webkit-animation-duration: 1.2s;
 -moz-animation-duration: 1.2s;
 -ms-animation-duration: 1.2s;
 -o-animation-duration: 1.2s;
 animation-iteration-count: infinite;
 -webkit-animation-iteration-count: infinite;
 -moz-animation-iteration-count: infinite;
 -ms-animation-iteration-count: infinite;
 -o-animation-iteration-count: infinite;
}
span.item-1 {
 background: #2ecc71;
}
span.item-2 {
 background: #3498db;
}
span.item-3 {
 background: #9b59b6;
}
span.item-4 {
 background: #e67e22;
}
span.item-5 {
 background: #c0392b;
}
span.item-6 {
 background: #e74c3c;
}
span.item-7 {
 background: #e74c8c;
}

.item-1 {
 animation-delay: -1s;
 -webkit-animation-delay: -1s;
 -moz-animation-delay: -1s;
 -ms-animation-delay: -1s;
 -o-animation-delay: -1s;
}

.item-2 {
 animation-delay: -0.9s;
 -webkit-animation-delay: -0.9s;
 -moz-animation-delay: -0.9s;
 -ms-animation-delay: -0.9s;
 -o-animation-delay: -0.9s;
}

.item-3 {
 animation-delay: -0.8s;
 -webkit-animation-delay: -0.8s;
 -moz-animation-delay: -0.8s;
 -ms-animation-delay: -0.8s;
 -o-animation-delay: -0.8s;
}

.item-4 {
 animation-delay: -0.7s;
 -webkit-animation-delay: -0.7s;
 -moz-animation-delay: -0.7s;
 -ms-animation-delay: -0.7s;
 -o-animation-delay: -0.7s;
}

.item-5 {
 animation-delay: -0.6s;
 -webkit-animation-delay: -0.6s;
 -moz-animation-delay: -0.6s;
 -ms-animation-delay: -0.6s;
 -o-animation-delay: -0.6s;
}

.item-6 {
 animation-delay: -0.5s;
 -webkit-animation-delay: -0.5s;
 -moz-animation-delay: -0.5s;
 -ms-animation-delay: -0.5s;
 -o-animation-delay: -0.5s;
}

.item-7 {
 animation-delay: -0.4s;
 -webkit-animation-delay: -0.4s;
 -moz-animation-delay: -0.4s;
 -ms-animation-delay: -0.4s;
 -o-animation-delay: -0.4s;
}

@-webkit-keyframes scale {
 0%, 40%, 100% {
 -moz-transform: scaleY(0.2);
 -ms-transform: scaleY(0.2);
 -o-transform: scaleY(0.2);
 -webkit-transform: scaleY(0.2);
 transform: scaleY(0.2);
 }

 20%, 60% {
 -moz-transform: scaleY(1);
 -ms-transform: scaleY(1);
 -o-transform: scaleY(1);
 -webkit-transform: scaleY(1);
 transform: scaleY(1);
 }
}
@-moz-keyframes scale {
 0%, 40%, 100% {
 -moz-transform: scaleY(0.2);
 -ms-transform: scaleY(0.2);
 -o-transform: scaleY(0.2);
 -webkit-transform: scaleY(0.2);
 transform: scaleY(0.2);
 }

 20%, 60% {
 -moz-transform: scaleY(1);
 -ms-transform: scaleY(1);
 -o-transform: scaleY(1);
 -webkit-transform: scaleY(1);
 transform: scaleY(1);
 }
}
@-ms-keyframes scale {
 0%, 40%, 100% {
 -moz-transform: scaleY(0.2);
 -ms-transform: scaleY(0.2);
 -o-transform: scaleY(0.2);
 -webkit-transform: scaleY(0.2);
 transform: scaleY(0.2);
 }

 20%, 60% {
 -moz-transform: scaleY(1);
 -ms-transform: scaleY(1);
 -o-transform: scaleY(1);
 -webkit-transform: scaleY(1);
 transform: scaleY(1);
 }
}
@keyframes scale {
 0%, 40%, 100% {
 -moz-transform: scaleY(0.2);
 -ms-transform: scaleY(0.2);
 -o-transform: scaleY(0.2);
 -webkit-transform: scaleY(0.2);
 transform: scaleY(0.2);
 }

 20%, 60% {
 -moz-transform: scaleY(1);
 -ms-transform: scaleY(1);
 -o-transform: scaleY(1);
 -webkit-transform: scaleY(1);
 transform: scaleY(1);
 }
}

js文件

var loading = {
 baosight : {
  showPageLoadingMsg : function(showMessage){
  if($("#_loading_p").length == 0){
   $("body").append(&#39;<p id="_loading_p"><span class="item-1"></span><span class="item-2"></span><span class="item-3"></span><span class="item-4"></span><span class="item-5"></span><span class="item-6"></span><span class="item-7"></span></p>&#39;);
  }
  if($("#_loadMsg").length == 0){
   $("body").append(&#39;<p id="_loadMsg">正在加载,请稍候... ...</p>&#39;);
  }
  if(showMessage == true || showMessage == "true" ){
   $("#_loadMsg").show();
  }
  $("#_loading_p").show();
  },
  hidePageLoadingMsg :function() {
  $("#_loading_p").hide();
  $("#_loadMsg").hide();
  }
 }
}

上面是我整理给大家的，希望今后会对大家有帮助。

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