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javascript高级this指向与严格模式1.this指向问题 情况一 function创建对象时，this指向window 情况二 字面量定义成对象里的函数，this指向object(调用对象) 123456var o = { fn:function () { console.log(this) } }o.fn() //...
JavaScript基础

JavaScript基础Day011 - 编程语言1.1 JavaScript是什么 JavaScript 是世界上最流行的语言之一，是一种运行在客户端的脚本语言 （Script 是脚本的意思） 脚本语言：不需要编译，运行过程中由 js 解释器( js 引擎）逐行来进行解释并执行 现在也可以基于 Node.js 技术进行服务器端编程 1.2 JavaScript的作用 表单动态校验（密码...

JavaScript常用高阶函数常用高阶函数 forEach —— 遍历数组(无返回值) find —— 查找器,查找符合条件的数据(只找第一个,找到就返回,停止查找) filter —— 过滤器,筛选数组中符合条件的数据,并以 数组 的方式返回 sort —— 排序器,代替冒泡排序(返回值为排好的 新数组) map —— 高级遍历(修改数据、提取数据、返回值为修改后的 ...
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