zoukankan html css js c++ java

弹窗的组件开发（一）

html部分：

<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>RunJS</title>
    </head>
    <body>
            <input type="button" class="btn1" value="1"> 
        <input type="button" class="btn2"  value="2"> 
        <input type="button" class="btn3"  value="3"> 
        
    <!-- <div class="login"><div class="title">登录 <a class="close">x</a></div><div class="content">asdasdasd</div></div> -->
    </body>
    </body>
</html>

2、css部分：

.login{
    position:absolute;
    border:1px solid red;
}
.login .title{
    height:30px;
    line-height:30px;
    position:relative;
}
.login .title .close{
    position:absolute;
    right:10px;
    top:6px;
}

3、JS部分

var oBtn1 = document.getElementsByTagName("input")[0];
var oBtn2 = document.getElementsByTagName("input")[1];
oBtn1.onclick = function(){
        var diag = new Diag();
        diag.init({
                
        });
}
oBtn2.onclick = function(){
        var diag2 = new Diag();
        diag2.init({
            150,
            height:400,
            dir:'right',
            title:'广告'
        });
} 
function Diag(){
        this.Login = null;
        this.settings = {
            300,
            height:300,
            dir:'center',
            title:'登录'
        }
    }
Diag.prototype.init = function(opt){
    extend(this.settings,opt);
    this.create();
    this.closeLogin();
}
        
Diag.prototype.create = function(){
        this.Login = document.createElement("div");
        this.Login.className = "login";
        this.Login.innerHTML =" <div class='title'>"+this.settings.title+"<a class='close'>x</a></div>"
                +"<div class='content'>asdasdasd</div>";
        document.body.appendChild(this.Login);
        this.setData();
}
    
Diag.prototype.setData = function(){
    this.Login.style.width = this.settings.width + "px";
        this.Login.style.height = this.settings.height + "px";
    if(this.settings.dir=="center"){
            this.Login.style.left = (this.clientWidth() -this.Login.offsetWidth)/2 + "px";
        this.Login.style.top = (this.clientHeight() -this.Login.offsetHeight)/2 + "px";
    }else if(this.settings.dir=="right"){
            this.Login.style.left = (this.clientWidth() -this.Login.offsetWidth) + "px";
        this.Login.style.top = (this.clientHeight() -this.Login.offsetHeight) + "px";
    }
}
    
 Diag.prototype.clientWidth = function(){
      return document.documentElement.clientWidth;
 }
        
Diag.prototype.clientHeight = function(){
      return document.documentElement.clientHeight;
}
        
 Diag.prototype.closeLogin = function(){
      var oA = document.getElementsByTagName("a")[0];
      var me  = this;
      oA.onclick = function(){
         document.body.removeChild(me.Login);
      }
}    
    
function extend(obj1,obj2){
      for(var attr in obj2){
          obj1[attr] = obj2[attr];
      }
}

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原文地址：https://www.cnblogs.com/wanliyuan/p/5277527.html