style属性

    style  属性<br />       cssText -->批量操作css<br />       length (了解)<br />       getPropertyValue()<br />       item() -->返回对应位置的css属性名<br />       removeProperty()<br />       setProperty

<p id="test">hello world</p>
    <script>
        var test = document.getElementById("test");
        test.style.cssText = "color:red;background-color:#333;font-size:14px;";
        console.log(test.style.getPropertyValue("color"))
        console.log(test.style)
        console.log(test.style.item(0))
        test.onclick = function(){
            this.style.removeProperty("color")
            this.style.setProperty("background-color","green")
        }
    </script>