JavaScript Built-in Objects Part 1

Introduction

• JavaScript Built-in objects have nothing to do with the Window or DOM object models.
• JavaScript built in objects can be used for basic data processing.
• Array, String, and Date/Time are all JavaScript Built-in Objects.
• A JavaScript Built-in object is a set of named values in JavaScript.

Javascript Built in Objects are divided into two groups.

1. Standard Objects
2. Other Built-in objects

Standard Objects by Category

Standard Built-in Objects: The terminology "standard built-in objects" (also known as "global built-in objects") should not be confused with "standard objects." Objects in the global scope are referred to as "standard objects" in this context.

In the global scope, this operator can be used to access the standard object. The global scope, in reality, is made of the properties of the standard object, including any inherited properties.

Numbers and Dates:

These foundation objects represent numbers, dates, and mathematical calculations.

1. Number:

• The Number objects represents numerical date, either integers or floating-point numbers.
• Number objects are created using the Number() constructor and contains Constants and methods.
• Number() function can convert values of different types to numbers.

Syntax:

Properties of Number object:

Methods of Number object:

2. BigInt:

• BigInt is a primitive wrapper object for representing and manipulating primitive bigint values that are too large for the number primitive to handle.
• A BigInt objects are created using the BigInt() constructor.
• A BigInt value, sometimes known as just a BigInt, is a bigint primitive that can be generated by appending n to the end of an integer literal or by invoking the BigInt() function Object and passing it an integer or string value.

Properties of BigInt object:

Methods of BigInt object:

3. Math:

• The Math object is used to execute simple and complicated arithmetic operations on Number values. It isn't even a function object.
• A Math objects are created using the Math() constructor.
• There are no constructors on the Math object. All of the Math object's methods and properties are static, meaning they are member functions of the Math object. There is no method to generate a Math object instance.

Properties of Math object:

Methods of Math object:

4. Date:

• When users require access to the present date and time, as well as previous and future dates and times. The Date object in JavaScript provides support for working with dates and times.
• A Date objects are created using the Date() constructor.
• The Date object abstracts dates and times in a system-independent way.
• Dates can be compared and converted to a readable string format as well. Millisecond precision is used to indicate a date.

Syntax:

Properties of Date object:

Methods of Date object:

Text Processing:

These objects represent strings and allow them to be manipulated.

1. String:

• In JavaScript, instances of the String object are used to represent all strings. A member of global objects, String is a wrapper class.
• A String objects are created using the String() constructor.
• It's used to do things like determining how long a string is, searching for specific characters inside it, extracting a substring, and so on.
• Single quotes(' ') or double quotes(" ") are used to enclose string literals.

Syntax:

Properties of String object:

Methods of String object:

2. RegExp:

• The RegExp object is used to validate a character pattern.
• A RegExp objects are created using the RegExp() constructor.
• RegExp defines methods for performing powerful pattern matching and search and replace functions on text using regular expressions.
• The following methods can be used to define regular expressions.
  • Using RegExp() Constructor: var RegularExpression = new RegExp(“pattern”,”flag”);
  • Using Literal: var RegularExpression = /pattern/flag;

Pattern: A string describing the regular expression's or another regular expression's pattern.
Flag: An optional string comprising any of the "g", "I", and "m" characteristics, which respectively specify global, case-insensitive, and multiple matches.

Properties of RegExp object:

Methods of RegExp object:

Fundamental Objects:

These are the foundational, fundamental objects that all other objects are built upon. General objects, booleans, functions, and symbols are all included.

1. Object:

• One of JavaScript's data types is represented by the Object class. It stores a variety of keyed collections as well as more complex entities. The Object() constructor or the object initializer / literal syntax can be used to build objects.
• A Object objects are created using the Object() constructor.
• Object operates exactly like a new Object() when invoked in a non-constructor context.

The Object constructor constructs an object wrapper for the given value.

• When the value is null or undefined, it will create and return an empty object.
• If the value already exists as an object, it will return it.
• Otherwise, it will return an object of the value's Type.

Properties of Object object:

Methods of Object object:

2. Function:

• A Function object is the basis of every JavaScript function.
• A Function objects are created using the Function() constructor.
• The Function constructor is used to create functions that only run in the global scope.

Properties of Function object:

Methods of Function object:

3. Boolean:

• The Boolean object is a wrapper class for global objects and a member of them.
• A Boolean objects are created using the Boolean() constructor.
• It converts a non-Boolean value into a Boolean value (true or false).
• The object is set to false if it has no initial value or if it is 0, -0, null, "", false, undefined, or NaN. Otherwise, it's true (even with the string "false")

We can create Boolean object by using below methods:

• By using Boolean Literal Notation: var bool = true;
• By using Boolean Object as Function: var bool = Boolean(true);
• By using Testable Expressions: if(true) {………….}

Properties of Boolean object:

Methods of Boolean object:

4. Symbol:

• Symbols are frequently used to add unique property keys to an object that won't conflict with keys added by other code and that are hidden from any mechanisms used by other code to access the object.
• A Symbol object are created using the Symbol() constructor.
• We write Symbol() with an optional string as its description to create a new primitive Symbol

Properties of Symbol object:

Methods of Symbol object: