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编程语言都具有内建的数据结构，但各种编程语言的数据结构常有不同之处。本文尝试列出 JavaScript 语言中内建的数据结构及其属性，它们可以用来构建其他的数据结构。

JavaScript has 8 Datatypes String Number Bigint Boolean Undefined Null Symbol Object The Object Datatype The object data type can contain both built-in objects, and user defined objects: Built-in object types can be: objects, arrays, dates, maps, sets, intarrays, floatarrays, promises, and more.

There are eight basic data types in JavaScript. Here, we’ll cover them in general and in the next chapters we’ll talk about each of them in detail.

typeof 运算符返回一个字符串，表示操作数的类型。

As we know from the chapter Data types, there are eight data types in JavaScript. Seven of them are called “primitive”, because their values contain only a single thing (be it a string or a number or whatever).

JavaScript 的设计是一个简单的基于对象的范式。一个对象就是一系列属性的集合，一个属性包含一个名和一个值。一个属性的值可以是函数，这种情况下属性也被称为方法。除了浏览器里面预定义的那些对象之外，你也可以定义你自己的对象。本章节讲述了怎么使用对象、属性、函数和方法，怎样实现自定义对象。

Methods for Defining JavaScript Objects Using an Object Literal Using the new Keyword Using an Object Constructor Using Object.assign() Using Object.create() Using Object.fromEntries()

本章介绍和说明了 JavaScript 中所有的标准内置对象、以及它们的方法和属性。

对于使用过基于类的语言（如 Java 或 C++）的开发者来说，JavaScript 实在是有些令人困惑——JavaScript 是动态的且没有静态类型。

Prototypal inheritance F.prototype Native prototypes Prototype methods, objects without __proto__

In the last chapter on constructors, we saw a decent amount of concepts tied to the main concept of a constructor function in JavaScript. Particularly, we saw what are constructors; how to create them; how to initialise objects out of them; check for instances of a constructor, and so on and so forth.

原型是 JavaScript 对象相互继承特性的机制。在这篇文章中，我们将解释什么是原型，原型链如何工作，以及如何为一个对象设置原型。

Learn Prototype In JavaScript | JavaScript Object Prototype Tutorial | Prototype Inheritance JavaScript, Prototype chain in JavaScript.

类型转换（Type conversion 或 typecasting）是指将数据由一种类型变换为另一种类型。在编译器（对于编译语言）或运行时（像 JavaScript 等脚本语言）自动转换数据类型时，会发生隐式转换。你也可以在源码中显式要求进行转换。

强制类型转换是将值从一种数据类型自动或隐式地转换为另一种数据类型（例如字符串转换为数字）。类型转换类似于强制类型转换，因为它们都将值从一种数据类型转换为另一种数据类型，只有一个关键的区别——强制类型转换是隐式的，而类型转换可以是隐式的，也可以是显式的。

Sometimes you need to explicitly convert the data type of a value into a different data type. Sometimes JavaScript will do this automatically for you. Bob explains how and why this happens. javascript type conversion - javascript type conversion - hindi. How Does JavaScript Type Coercion Work type conversion in javascript | javascript full tutorial in hindi.

Converting Strings to Numbers Converting Numbers to Strings Converting Dates to Numbers Converting Numbers to Dates Converting Booleans to Numbers Converting Numbers to Booleans

Explain typecasting in Javascript - Typecasting in JavaScript means converting one data type to another data type i.e., the conversion of a string data type to Boolean or the conversion of an integer data type to string data type. The typecasting in JavaScript is also known as type conversion or type coercion. Types of conversions The

Common Javascript implicit coercion gotchas, how it works, what should be avoided and why

In this article, you will learn about type Conversions (or) casting in JavaScript and its types.

Explain typecasting in Javascript - Typecasting in JavaScript means converting one data type to another data type i.e., the conversion of a string data type to Boolean or the conversion of an integer data type to string data type. The typecasting in JavaScript is also known as type conversion or type coercion. Types of conversions The

JavaScript Type Casting ☛ JavaScript Implicit conversion ☛ JavaScript Explicit conversion Enjoy the new video and don't forget to subscribe.