console 命令行工具 X clear

console

var name = 222

var a = {
    name: 111,
    say: function () {
        console.log(this.name)
    }
}

var fun = a.say

fun() //fun.call(window)

a.say() //a.say.call(a)

var b = {
    name: 333,
    say: function (fun) {
        fun()  //fun.call(window)
    }
}

b.say(a.say)

b.say = a.say

b.say() // b.say.call(b)

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=, initial-scale=">
	<meta http-equiv="X-UA-Compatible" content="">
	<title></title>
</head>
<body>
	
</body>
</html>