JavaScript 类型检查原理实现小

Mr Rookie

于 2021-01-05 16:15:48 发布

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本文链接：https://blog.youkuaiyun.com/Chunxiliao/article/details/112239238

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查验数据类型

ifType = text => Object.prototype.toString.call(text).replace("[object",'').replace(/\]/,'').trim();
console.log(
   ifType([]), // Array
   ifType({}), // Object
   ifType(null), // Null
   ifType(undefined), // undefined
   ifType("1"), // String
   ifType(0), // Number
   ifType(new Set()) // Set
)

typeof原理 -- https://www.cnblogs.com/thaipine/p/10750402.html

instanceOf详解 -- https://blog.youkuaiyun.com/weixin_40013817/article/details/103182967