lovecoding
/
web0715


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{
            color: red;
        }
        div{

        }
        #box2{

        }
    </style>
</head>
<body>
    <div class="box">a</div>
    <div class="box">b</div>
    <div id="box2">c
        <div class="box3">d</div>
    </div>
    <span class="str">hello world</span>
    <script>

        var oStr = document.getElementsByClassName("str")[0];
        oStr.innerText = "你好世界";
        oStr.style.color = "yellow";
        // var aBox = document.getElementsByTagName("div");
        // console.log(aBox);
        // aBox[]

    //    var oBox = document.getElementById("box2");
    //    oBox.innerText = "你好";
       
       // var aBox = document.getElementsByClassName("box");
        // console.log(aBox);
        // aBox[0].innerText = "hello";
        // var obj = {
        //     a:1,
        //     b:2,
        //     foo:function(){
        //         console.log("hello");
        //     }
        // }
        // obj.foo()
    </script>
</body>
</html>