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>
</head>
<body>
    <script>
        "use strict"
        // 严格模式
        // var a = 10;
        // var a = "hello";
        // console.log(a);
        // a=10;
        var a = 10;
        function foo(){
            console.log(this.a);
        }
        foo();
    </script>
</body>
</html>