<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>ll</title>
</head>
<body>
<script>
var aaa = function (x, y) {
console.log(this)
console.log(x, y)
}
var thisObj = {data: 111}
aaa(1, 2)
// this -> window
// 1,2
// 1、bind
aaa.bind(thisObj)(3, 4)
// this -> thisObj
// 3,4
// 2、call
aaa.call(thisObj, 5, 6)
// this -> thisObj
// 5,6
// 3、apply
aaa.apply(thisObj, [7, 8])
// this -> thisObj
// 7,8
</script>
</body>
</html>