获取元素的样式属性 原

 <div id = "test" style = "width:600px; height:300px;background-color:pink;"></div>

<script type = "text/javascript">
 window.onload = function(){
    var test = document.getElementById("test");
    var tag = document.getElementById("tag");
    console.log(getStyle(test,"width"));
	function getStyle(element, attr) {
    if(element.currentStyle) {
        return element.currentStyle[attr];
    } else {
        return window.getComputedStyle(element, null)[attr];
    }
}
 
   // console.log(test.currentStyle[width]);//不识别此句话
   // console.log(window.getComputedStyle(test).width); //500px;
   // console.log(window.getComputedStyle(test)['width']);//500px;
    
  }

</script>