为什么显示结果不对呢
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回复: #50 实现 js 数据类型的判断
控制台都试了试木有问题呀const type = (obj)=> { let typeObj = typeof obj; if(typeObj == 'object'){ //先看看是不是null if(obj === null){ return null }else{ let prototypeObj = Object.getPrototypeOf(obj) let prototypeObjConstructor = prototypeObj.constructor.name.toLowerCase(); return prototypeObjConstructor; } } return typeObj; }