lovecoding
/
W250913


			
				
					
						
						
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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>
</head>
<body>
    <div class="box">hello</div>
    <div class="box">world</div>
    <script>
        // querySelector 获取单个元素。括号中写css选择器
        var oBox = document.querySelector("div");
        // querySelectorAll 获取多个元素
        var aBox = document.querySelectorAll(".box");
        console.log(oBox);
        console.log(aBox);
    </script>
</body>
</html>