What is the object type in javascript?

In JavaScript, the object type refers to a composite data type that allows you to store collections of data and more complex entities. Objects can be seen as collections of properties, where each property is a key-value pair. The key (or property name) is always a string, while the value can be any JavaScript data type, including another object, which allows for building complex data structures.

Objects in JavaScript are mutable, meaning that their properties can be altered after the object is created. This is in contrast to primitive data types (like numbers, strings, and Booleans), which are immutable. You can add, modify, and delete properties of objects at runtime.

JavaScript objects are typically created using either object literals, the Object constructor, or using the new keyword with constructor functions. Here are examples of each method:

1. Object Literal: This is the simplest way to create an object. It's defined by placing a comma-separated list of key-value pairs within braces {}.

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   const person = {
       firstName: "John",
       lastName: "Doe",
       age: 30
   };

2. Object Constructor: The Object constructor creates an object wrapper.

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   const person = new Object();
   person.firstName = "John";
   person.lastName = "Doe";
   person.age = 30;

3. Constructor Function: This involves defining a function to specify an object type, then creating new instances of that type with new.

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   function Person(firstName, lastName, age) {
       this.firstName = firstName;
       this.lastName = lastName;
       this.ag...