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JavaScript中的*top、*left、*width、*Height详解

2024-07-25 12:56:13   225人阅读

来源：http://www.ido321.com/911.html

html代码

   1: <body> 
   2:     <div class="father" id="father">
   3:         <h3>这是父元素，屏幕分辨率是1366*768</h3>
   4:         <div class="son" id="son">
   5:             <h3>这是子元素，祝大家国庆快乐 </h3>
   6:             <div class="grandson" id="grandson">
   7:                 <h3>这是孙子元素，祝大家国庆快乐 </h3>
   8:                 <h3>我的博客:www.ido321.com</h3>
   9:                 <h3>程序爱好者QQ群:</h3>
  10:                 <h3>259280570  </h3>
  11:                 <h3>欢迎你加入 </h3>
  12:                 <h3>国庆快乐  </h3>
  13:             </div>
  14:         </div>
  15:     </div>
  16:     <div class="data">
  17:         <h3>数据输出</h3>
  18:         <div id="data"></div>
  19:     </div>
  20: </body>

css

   1: *
   2:     {
   3:         margin: 0 auto;
   4:     }
   5:     .father
   6:     {
   7:         width: 500px;
   8:         height: 750px;
   9:         border: 5px solid red;
  10:         float: left;
  11:     }
  12:     .son
  13:     {
  14:         width: 400px;
  15:         height: 300px;
  16:         border: 5px solid black;
  17:         margin: 20px;
  18:     }
  19:     .grandson
  20:     {
  21:         width: 150px;
  22:         height: 100px;
  23:         border: 5px solid blue;
  24:         margin: 20px;
  25:         overflow: auto;
  26:     }
  27:     .data
  28:     {
  29:         width: 600px;
  30:         height: 750px;
  31:         border: 5px solid red;
  32:         float: left;
  33:         margin-left: 15px;
  34:     }

js:

   1: window.onload = function()
   2:     {
   3:         /*获取元素对象*/
   4:         var father = document.getElementById(‘father‘);
   5:         var son = document.getElementById(‘son‘);
   6:         var grandson = document.getElementById(‘grandson‘);
   7:         var data = http://www.mamicode.com/document.getElementById(‘data‘);
   8:         data.innerHTML = "<h3>获取视窗大小(跟窗口大小有关)</h3>";
   9:         data.innerHTML += "document.body可见区域宽: "+document.body.clientWidth+"<br/>";
  10:         data.innerHTML += "document.body可见区域高: "+document.body.clientHeight+"<br/>";
  11:         data.innerHTML += "window.innerWidth可见区域宽: "+window.innerWidth+"<br/>";
  12:         data.innerHTML += "window.innerHeight可见区域高: "+window.innerHeight+"<br/>";
  13:         data.innerHTML += "document.documentElement可见区域宽: "+document.documentElement.clientWidth+"<br/>";
  14:         data.innerHTML += "document.documentElement可见区域高: "+document.documentElement.clientHeight+"<br/>";
  15:         data.innerHTML += "<h3>获取元素自身大小(跟是否有滚动条无关)</h3>";
  16:         data.innerHTML += ".son自身宽度(offsetWidth属性，包括左右边框)："+son.offsetWidth+"<br/>";
  17:         data.innerHTML += ".son自身高度(offsetHeight属性，包括上下边框)："+son.offsetHeight+"<br/>";
  18:         data.innerHTML += ".son可视宽度(clientWidth属性，不包括左右边框)："+son.clientWidth+"<br/>";
  19:         data.innerHTML += ".son可视高度(clientHeight属性，不包括上下边框)："+son.clientHeight+"<br/>";
  20:         data.innerHTML += "<h3>获取.grandson滚动大小和可视大小</h3>";
  21:         data.innerHTML += ".grandson滚动宽度(scrollWidth属性)："+grandson.scrollWidth+"<br/>";
  22:         data.innerHTML += ".grandson滚动高度(scrollHeight属性)："+grandson.scrollHeight+"<br/>";
  23:         data.innerHTML += ".grandson可视宽度(clientWidth属性，不包括竖直滚动条和border)："+grandson.clientWidth+"<br/>";
  24:         data.innerHTML += ".grandson可视高度(clientHeight属性，不包括水平滚动条和border)："+grandson.clientHeight+"<br/>";
  25:         data.innerHTML += "<h3>获取.grandson被卷去的大小(跟滚动条的位置有关)</h3>";
  26:         data.innerHTML += ".grandson被卷去的高(scrollTop属性，竖直滚动条滑到最底端)："+grandson.scrollTop+"<br/>";
  27:         data.innerHTML += ".grandson被卷去的左(scrollLeft属性，水平滚动条滑到最右端)："+grandson.scrollLeft+"<br/>";
  28:         data.innerHTML += "<h3>获取浏览器窗口位置(跟窗口大小有关)</h3>";
  29:         /*
  30:         *IE、Chrome、Safari、Opera 都提供了支持 window.screenLeft 和 *window.screenTop，但是Firxfox不支持这个两个属性；
  31:         *Firxfox、Chrome、Safari、Opera 都提供了支持 window.screenX *和 window.screenY，但是 IE 不支持这个两个属性；
  32:         */
  33:         var leftPos = (typeof window.screenLeft == ‘number‘)?window.screenLeft:window.screenX;
  34:         var topPos = (typeof window.screenTop == ‘number‘)?window.screenTop:window.screenY;
  35:         data.innerHTML += "body网页正文部分上(window.screenTop(Y))："+ topPos+"<br/>";
  36:         data.innerHTML += "body网页正文部分左(window.screenLeft(X))："+ leftPos+"<br/>";
  37:         data.innerHTML += "<h3>获取屏幕分辨率</h3>";
  38:         data.innerHTML += "屏幕分辨率的高(window.screen.height)："+ window.screen.height+"<br/>";
  39:         data.innerHTML += "屏幕分辨率的宽(window.screen.width)："+ window.screen.width+"<br/>";
  40:         data.innerHTML += "<h3>获取屏幕可用的高宽</h3>";
  41:         data.innerHTML += "屏幕分辨率的高(window.screen.availHeight)："+ window.screen.availHeight+"<br/>";
  42:         data.innerHTML += "屏幕分辨率的宽(window.screen.availWidth)："+ window.screen.availWidth+"<br/>";
  43:         data.innerHTML += "<h3>获取.father的边框大小</h3>";
  44:         data.innerHTML += ".father上边框(clientTop)："+ father.clientTop+"<br/>";
  45:         data.innerHTML += ".father左边框(clientLeft)："+ father.clientLeft+"<br/>";
  46:         data.innerHTML += "<h3>获取.son到父元素边界的距离(即对应margin+父元素对应的border)</h3>";
  47:         data.innerHTML += ".son到父元素上边界(offsetTop)："+ son.offsetTop+"<br/>";
  48:         data.innerHTML += ".son到父元素左边界(offsetLeft)："+ son.offsetLeft+"<br/>";
  49:     }
 
ps：浏览器对盒子的解析存在差异，所以以上得出的数据也会存在小小差异。附图一张

演示地址：http://ido321.qiniudn.com/test.html
 
关于获取视窗大小的区别：http://www.ido321.com/906.html


 

JavaScript中的*top、*left、*width、*Height详解


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