2018-05-03 call apply bind

作者: wuliduoduo | 来源:发表于2018-05-03 19:51 被阅读0次

<!DOCTYPE html>
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    <meta charset="UTF-8">
    <title>Document</title>
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<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>
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