js实现弹窗效果

 
 
 



打开弹窗


 
 

 

  
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#myModal{
 display: none;
 position: fixed;
 z-index:1;
 left:0;
 top:0;
 width: 100%;
 height:100%;
 overflow: auto;
 background:rgba(0,0,0,0.5);
}
#myModal .modal{
 width: 500px;
 height:300px;
 position: relative;
 top:50%;
 left:50%;
 margin-top: -150px;
 margin-left: -250px;
 animation:animate 1s;
}
.modal .modal-header{
 height:50px;
 background:white;
 color: #000;
 line-height:50px;
 border-bottom: 1px solid #000000;
}
.modal .modal-header p{
 display: inline-block;
 margin:0;
 position: absolute;
 left: 20px;
}
.modal .modal-header .close{
 position: absolute;
 right:20px;
 font-size: 20px;
 cursor:pointer;
}
.modal .modal-content{
 background: white;
 height:200px;
 text-align: center;
 line-height: 200px;
}
.modal .modal-content p{
 margin:0;
}
.modal .modal-footer{
 position: relative;
 height:50px;
 background: white;
}
/*添加动画*/
@keyframes animate{
 from{top:0;opacity:0}
 to{top:50%;opacity:1}
}

window.Onload=function () {
 //获取弹窗按钮
 var btn=document.getElementById("btn");
 var close=document.getElementsByClassName("close")[0];
 var myModal=document.getElementById("myModal");
 //按钮绑定事件
 btn.Onclick=function () {
  //获取弹窗

  myModal.style.display="block";
 }
 close.Onclick=function () {
  myModal.style.display="none";
 }
 //用户点击其他地方关闭弹窗
 window.Onclick=function (event) {
  if(event.target ==myModal){
   myModal.style.display="none";
  }
 }
}