JS中函数作为参数和返回值 15console.console.console.

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<head>
	<meta charset="UTF-8">
	<title>Document</title>
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<body>
	<script>
		/*let say=function()
		{
			 console.log("hello world");
		}
		say();
		let fn=say;
		fn();
		 // 将函数作为其他函数的参数
        function test(fn) { // let fn = say;
            fn();
        }*/
        function test()
        {
        	let say=function()
        	{
        		console.log("牛逼");
        	}
        	return say;
        }
        let fn=test();
        fn();
        //这个可以解析为:
        function test()
        {
        	return function()
        	{
        		console.log("牛逼");
        	};
        }
        let fn=test();
        fn();

        //好了完成
	</script>
</body>
</html>