lovecoding
/
Web1020


			
				
					
						
						
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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>
        button{
            display: block;
            margin: 100px auto;
            width: 100px;
            height: 50px;
        }
    </style>
</head>
<body>
    <button>按钮</button>
    <script>
        var oBtn = document.getElementsByTagName("button")[0];
        // 鼠标左键
        oBtn.onclick = function(){
            console.log("hello world");
        }
        // 鼠标右键
        oBtn.oncontextmenu = function(){
            console.log("右键");
            // 阻止默认事件 只能写在事件函数里面
            return false;
        }
    </script>
</body>
</html>