js this

caigou.

于 2024-12-05 21:19:51 发布

阅读量301

点赞数 2

文章标签： javascript 前端开发语言

本文链接：https://blog.youkuaiyun.com/m0_56294205/article/details/144276300

版权

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>this</title>
</head>
<body>
<script>
    let fengfeng = "枫枫"
    console.log(this)
    // alert("123")



    function get() {
        console.log("get", this, arguments)
    }
    const set = ()=>{
        console.log("set", this)
    }

    const obj = {
        name: "fengfeng",
        get: get,
        set: set,
    }

    get()
    obj.get()
    set()
    obj.set()


    // 改变this

    get.call(obj, 1,2,3)
    get.apply(obj, [1,2,3])
    get.bind(obj, 1,2,3)(4,5,6)




    // 箭头函数没有办法修改this指向
    set.call(obj, 1,2,3)
    set.apply(obj, [1,2,3])
    set.bind(obj, 1,2,3)(4,5,6)


</script>
</body>
</html>