console 命令行工具 X clear

console

var oDiv = document.getElementsByClassName('demo')[0]


function getStyle(ele,name){
  if(window.getComputedStyle){
    return getComputedStyle(ele,null)[name]
  }else{
    return ele.getCurrentStyle[name]
  }
}

console.log(getStyle(oDiv,'width'))

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <title>封装getStyle方法</title>
</head>
<body>
  
  <div class="demo">demo</div>
  
</body>
</html>

    .demo{
      width:200px;
      height: 200px;
      background: #f40;
    }