• JS案例练习 — 给div添加样式选择功能


      附加效果图:

      

      CSS内容:

      

     1 <style>
     2     *{margin:0; padding:0px}
     3     li{list-style:none}
     4     body{font:24px 'Microsoft YaHei'; color:black;background: darkgray;}
     5     .last{text-align: center; margin: 0px!important; padding: 5px 0 20px 0px;}
     6     .div0{width: 500px;height: 500px;border: 1px solid gray;background: lightgray; margin: 30px auto;text-align: center;
     7         vertical-align: middle; display: table-cell; }
     8     .div1{margin: 20px auto; width: 500px; }
     9     .div1 h2{background: olivedrab; font-size: 20px; text-align: center;line-height: 30px; color: white; font-weight: normal; line-height: 50px;}
    10     .div1 h2:hover{background:green;}
    11     .div1 span{font-weight: normal;font-size: 16px; background: red; color: white; padding: 10px;}
    12     #div2{width:100px; height:100px; border: 1px solid gray;background: lawngreen; margin: 0 auto;display: inline-block;border-radius: 5px;}
    13     .div3 {border: 1px solid dimgray; padding:0 15px;background: white;display: none;position: absolute;
    14         vertical-align: middle;top: 50%;left: 50%;margin-top: -302px;margin-left: 250px;font-size: 16px;}
    15     .div3 ul li{font-size: 15px; font-weight:normal;  margin: 15px 0 25px 0;}
    16     #red{background: crimson; color:white; font-size: 14px; padding: 6px 10px; margin-right: 10px;cursor:pointer; border-radius:3px;}
    17     #yellow{background: darkorange; color:white; font-size: 14px; padding: 6px 10px; margin-right: 10px;cursor:pointer;border-radius:3px;}
    18     #blue{background:cornflowerblue; color:white; font-size: 14px; padding: 6px 10px;cursor:pointer; border-radius:3px;}
    19     #red:hover{background: red;}
    20     #yellow:hover{background: orangered;}
    21     #blue:hover{background:blue;}
    22     #w200,#h200,#w300,#h300,#w400,#h400{border: 1px solid darkgrey;font-size: 14px; padding: 6px 4px;margin-right: 8px; background:gainsboro ;cursor:pointer;border-radius:3px;}
    23     #w200:hover,#h200:hover,#w300:hover,#h300:hover,#w400:hover,#h400:hover{border: 1px solid dimgray; background: forestgreen; color: white}
    24     #blueC,#blueS{background:#444444;padding: 5px 12px; color:white; font-size: 14px; cursor:pointer;margin-right: 5px;border-radius:4px;}
    25     #blueC:hover,#blueS:hover{background:#222222;}
    26     #click{cursor: pointer;}
    27 </style>

      JS内容:

      

     1 <script>
     2     window.onload = function(){
     3         //获取设置ID
     4         var oCli = $('click');
     5         //获取div2的ID
     6         var oDiv2 = $('div2');
     7         //获取div3的ID
     8         var oDiv3 = $('div3');
     9         //div3展出效果
    10         oCli.onclick = function(){
    11             oDiv3.style.display = 'block';
    12         }
    13         //获取背景ID
    14         var oRed = $('red');
    15         var oYellow = $('yellow');
    16         var oBlue = $('blue');
    17         //设置背景
    18         oRed.onclick = function(){
    19             oDiv2.style.background = 'red';
    20         }
    21         oYellow.onclick = function(){
    22             oDiv2.style.background = 'orange';
    23         }
    24         oBlue.onclick = function(){
    25             oDiv2.style.background = 'blue';
    26         }
    27         //获取宽度ID
    28         var oW200 = $('w200');
    29         var oW300 = $('w300');
    30         var oW400 = $('w400');
    31         //设置宽度
    32         oW200.onclick = function(){
    33             oDiv2.style.width = '200px';
    34         }
    35         oW300.onclick = function(){
    36             oDiv2.style.width = '300px';
    37         }
    38         oW400.onclick = function(){
    39             oDiv2.style.width = '400px';
    40         }
    41         //获取高度ID
    42         var oH200 = $('h200');
    43         var oH300 = $('h300');
    44         var oH400 = $('h400');
    45         //设置高度
    46         oH200.onclick = function(){
    47             oDiv2.style.height = '200px';
    48         }
    49         oH300.onclick = function(){
    50             oDiv2.style.height = '300px';
    51         }
    52         oH400.onclick = function(){
    53             oDiv2.style.height = '400px';
    54         }
    55         //获取确认和取消ID
    56         var oSure = $('blueS');
    57         var oCancle = $('blueC');
    58         //div3关闭
    59         oSure.onclick = function(){
    60             oDiv3.style.display = 'none';
    61         }
    62         //恢复默认设置 (不知道此处有没有其他更简洁的方式处理)
    63         oCancle.onclick = function (){
    64             oDiv3.style.display = 'none';
    65             oDiv2.style.background ='lawngreen';
    66             oDiv2.style.width = '100px';
    67             oDiv2.style.height = '100px';
    68             oDiv2.style.border = '1px solid gray';
    69             oDiv2.style.margin = '0 auto';
    70             oDiv2.style.radius = '5px';
    71         }
    72         //通用ID调取
    73         function $(id){
    74             return document.getElementById(id);
    75         }
    76     }
    77 </script>

      Html内容: 

     1 <!DOCTYPE html>
     2 <html lang="en">
     3 <head>
     4     <meta charset="UTF-8">
     5     <title>设定样式功能</title>
     6 </head>
     7 <body>
     8 <div class="div1">
     9     <h2 id="click">点此设置样式</h2>
    10     <div class="div0">
    11         <div id="div2"></div>
    12     </div>
    13 </div>
    14 <div class="div3" id="div3">
    15     <ul>
    16         <li>请选择背景色:</li>
    17         <li><span id="red"></span><span id="yellow"></span><span id="blue"></span></li>
    18         <li>请选择宽(px):</li>
    19         <li><span id="w200">200</span><span id="w300">300</span><span id="w400">400</span></li>
    20         <li>请选择高(px):</li>
    21         <li><span id="h200">200</span><span id="h300">300</span><span id="h400">400</span></li>
    22         <li class="last"><span id="blueC">恢复</span> <span id="blueS">确认</span></li>
    23     </ul>
    24 </div>
    25 </body>
    26 </html>
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  • 原文地址:https://www.cnblogs.com/liumobai/p/5008746.html
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