lovecoding
/
W250511


			
				
					
						
						
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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>
    <!-- 自定义属性 -->
    <!-- 自定义属性的格式：data-属性名="属性值"  属性名自己起-->
    <div data-id="1">a</div>
    <div data-id="2">b</div>
    <div data-id="3">c</div>
    <script>
        var aDiv = document.querySelectorAll("div");

        for(var i=0;i<aDiv.length;i++){
            aDiv[i].onclick = function(){
                console.log(this.dataset.id);
            }
        }

    </script>
</body>
</html>