函式屬性與方法
阿新 • • 發佈：2018-12-08
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<script>
function sum(num1,num2) {
return num1+num2;
}
function callsum1(num1,num2) {
console.log(this);//Window {postMessage: ƒ, blur: ƒ, focus: ƒ, close: ƒ, frames: Window, …}
return sum.apply(this,arguments)
}
function callsum2(num1,num1) {
console.log(this);////Window {postMessage: ƒ, blur: ƒ, focus: ƒ, close: ƒ, frames: Window, …}
return sum.apply(this,arguments)
}
console.log(callsum1(10,20));//30
console.log('-----------------------');
console.log(callsum2(10,20));//30
</script>
</body>
</html>