2018-05-03 call apply bind
2018-05-03 本文已影响0人
wuliduoduo
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<script>
var sum1=Math.max(1,2,3,4,5);
console.log(sum1);
var sum2=Math.max.apply(null,[1,2,3,4,5]) //null代表this
console.log(sum2);
var sum3=Math.max.call(null,1,2,3,4,5) //apply数组，call参数
console.log(sum3);
var sum4=Math.max.bind(null,1,2,3,4,5) //bind相当默认参数
console.log(sum4());
console.log(sum4(7,8));
function add(x,y){
return x+y;
}
var plus1=add.bind(null,1);
console.log(plus1(5));
//等价于
var plus2=function plus1(y){
return add(1,y)
}
console.log(plus2(5))
</script>
</body>
</html>
