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() 
//222

a.say() 
//111

var b = {
    name: 333,
    say: function (fun) {
        fun ()
    }
}
b.say(a.say) // 222

b.say = a.say
 
b.say() //333

<!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>