JavaScript中的原始数据类型和非原始数据类型之间的区别 [英] Difference between Primitive and non-primitive datatypes in JavaScript

问题描述

我无法准确理解JavaScript中原始数据类型和非原始数据类型之间的区别，即使它使用相同的名称声明，即var。

I am not able to understand exactly what is difference between primitive and non primitive data types in JavaScript even it is declared using same name i.e var.

推荐答案

Data Types (JavaScript):

Primary Data Types
The primary (primitive) data types are:
String, Number, Boolean

Composite Data Types
The composite (reference) data types are:
Object, Array

Special Data Types
The special data types are:
Null, Undefined

点击这里了解详情：

  var test1 = 1;
  var test2 = "Something";
  var test3 = true;
  var test4 = {};
  var test5 = new Array();
  var test6 = new Date();
  var test7;
  var test8 = null;

  alert(typeof (test1)); //number
  alert(typeof (test2)); //string
  alert(typeof (test3)); //boolean
  alert(typeof (test4)); //object
  alert(typeof (test5)); //object
  alert(typeof (test6)); //object
  alert(typeof (test7)); //undefined
  alert(typeof (test8)); //object

这篇关于JavaScript中的原始数据类型和非原始数据类型之间的区别的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！