一、查值的类型（可用于拷贝）
1 /* 2 ????* @Author: guojufeng@ ?3 ????* @Date: 2017-12-20 15:07:06 4 ????* @purpose 获取一个值的类型 5 ????* @param {variateName} target: 要获取类型的变量名或对象 6 ????* @output {string} result || "null": 返回的参数 - result或者null,为字符串形式的 7 ????*/ 8 ????function getType(target) { 9 ??????if(target === null){10 ????????console.log(target)11 ????????return "null";12 ??????}13 ??????let result = typeof (target);14 ??????if (result == "object") { 15 ????????if (target instanceof Array) {16 ??????????result = "array";17 ????????} else if (target instanceof Object) {18 ??????????result = "object";19 ????????}20 ??????}21 ??????console.log(result)22 ??????return result;//返回类型值的字符串形式23 ????}应用：
1 var nu= null;// null 怎么算2 var un= undefined;3 var c = new Array;4 var d = {};5 console.log(getType(c),getType(d),getType(nu),getType(un))js - 常用功能方法汇总（updating...）
原文地址：https://www.cnblogs.com/padding1015/p/9879219.html