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JavaScriptLearning
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执行上下文.html

<!DOCTYPE html>
<html>

	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>

	<body>
		<script type="text/javascript">
			var color = 'blue';
			function changeColor() {
				var anotherColor = 'red';

				function swapColors() {
					console.log(this)
					var tempColor = anotherColor;
					anotherColor = color;
					color = tempColor;
				}
				swapColors();
			}
			changeColor() //打断点,看调试的scope
		</script>
	</body>

</html>