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>
        // var a = 10;
        // var b = a;
        // a = 20;
        // console.log(b);

        var arr1 = [1,2,3];
        var arr2 = arr1;
        arr1[0] = 100;
        console.log(arr2)
    </script>
</body>
</html>