批量修改样式及全选反选

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
        <style type="text/css">
            *{
            margin:0 auto;
            padding: 0;
        }
        .btn{
            width: 200px;
            height: 60px;
            background-color: #002752;
            color:white;
            text-align: center;
            line-height:60px;
            border-radius: 5px;
        }
        .list{
            width:400px;
            height: 200px;
            border: 1px solid #002752;
            margin-top: 20px;
        }
        </style>
        
    </head>
    <body>
        <input type="text" name="" id="" value="" />
        <input type="text" name="" id="" value="" />
        <div class="btn">批量修改样式</div>
        <div class="list"></div>
        <div class="list"></div>
        <div class="list"></div>
        
        <div class="btn"bs="1">全选</div>
        <div class="btn"bs="2">反选</div>
        <div class="btn"bs="3">不选</div>
            
        <input type="checkbox" name="" id="" value="" />租房
        <input type="checkbox" name="" id="" value="" />买房
        <input type="checkbox" name="" id="" value="" />卖房
        <input type="checkbox" name="" id="" value="" />中介
        <input type="checkbox" name="" id="" value="" />商家
    
    </body>
</html>
<script type="text/javascript">
     var btnlist =document.getElementsByClassName("btn");
     for(var i=1;i<btnlist.length;i++){
         btnlist[i].onclick=function () {
             //this关键词
             //this 跟点击,移入,移出事件在一起用;
             //console.log(this);
             // var ipt =document.getElementsByTagName("input");
             var ipt=document.querySelectorAll("input[type=checkbox]");
             switch(this.getAttribute("bs")){
                 case "1":
                 for(var i=0;i<ipt.length;i++){
                     ipt[i].checked=true;
                 }
                 break;
                 case "2":
                 for(var i=0;i<ipt.length;i++){
                     ipt[i].checked=ipt[i].checked?false:true;
                 }
                 break;
                 default:
                        var num=0;
                        while (num<ipt.length){
                               ipt[num].checked=false;
                               num++;
                        }
                        break;
             }
         }  
     }
     //1.找到需要挂事件的元素
     var btn = document.getElementsByClassName("btn")[0];
     //2.挂事件
     btn.onclick = function(){
         //3找到要修改的元素
         var list = document.getElementsByClassName("list");
         //4 循环元素,给每一个改变class名字
         for(var i=0;i<list.length;i++){
            list[i].style.width="300px";
            list[i].style.height="300px";
            list[i].style.backgroundColor="#003B4D";
         }
     }
     
     
     

猜你喜欢

转载自www.cnblogs.com/zhengleilei/p/9062263.html