Objects

In JavaScript, and object can be described as standalone entity with properties and type.

The values in JavaScript can be divided into two categories:

Primitive

• Numbers
• Booleans
• Strings
• Null
• Undefined

Objects

• Math
• Date
• JSON
• Window
• Document
• objects that you create
• arrays
• functions

on occasions the following can be objects:

• Numbers
• Booleans
• Strings

JavaScript objects can be thought of as simple collections of name-value pairs. As such, they are similar to:

• Dictionaries in Python.
• Hashes in Perl and Ruby.
• Hash tables in C and C++.
• HashMaps in Java.
• Associative arrays in PHP.