Agent skill

basis

View SKILL.md on GitHub Repository
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Install this agent skill to your Project

npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/development/basis

SKILL.md

JavaScript小技巧

来源：https://annatarhe.github.io/2016/04/19/hack-js-code.html

类型转换

1. 转为boolean

javascript
!!'foo' // true
!!0 //false

2. 转为number

javascript
+'45'
+new Date //转为数字

**3. ~~

~是一个按位取非的操作，返回数值的反码，是二进制操作，JavaScript中的number都是double类型的，在位操作的时候会转化为int，两次就还是原来的数

javascript
~~3.1415 // 3 等同于parseInt()
~~5.678 //5

IIFE

创建一个函数作用域，防止全局污染，

javascript
(function (arg) {
    //作用域
});

Closure

闭包：有权访问外部函数作用域的函数，作用是封装，保存变量的状态

javascript
var counter = function() {
    counter = 0 ;
    return function() {
        return count++;
    }
}

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