In this tutorial, we will understand the special features of Javascript.
Javascript is a popular programming language. Javascript features are flexible. Many open-source libraries are available. GitHub contains a large volume of Javascript code by developers across the world. Javascript works well in the front end and back end.
Javascript has a simple syntax. Without any settings, anyone can execute Javascript programs and make them user-friendly. One individual having basic knowledge of HTML, CSS and coding can work with Javascript.
Features of Javascript
Scripting
Javascript executes the client-side script in the browser.
Interpreter
The browser interprets JavaScript code.
Event Handling
Events are actions. Javascript provides event-handling options.
Light Weight
As Javascript is not a compiled language, source code never changes to byte code before running time. Low-end devices can also run Javascript because of its lightweight feature.
Case Sensitive
In Javascript, names, variables, keywords, and functions are case-sensitive.
Control Statements
Javascript has control statements like if-else-if, switch-case, and loop. Users can write complex code using these control statements.
Objects as first-class Citizens
javsscript array, function, and symbols are objects which can inherit the Object prototype properties. Objects being first-class citizens means Objects can do all tasks.
Supports Functional Programming
Javascript functions can be an argument to another function, can call by reference, and can assign to a variable.
Dynamic Typing
Javascript variables can have any value type. The same variable can have a string value, an integer value, or any other.
Client-side Validations
Javascript client-side validations allow users to submit valid data to the server during a form submission.
Platform Independent
Javascript will run in the same way in all systems with any operating system.
Async Processing
Javascript async-await and promise features provide asynchronous nature. As the processes run in parallel, it improves processing time and responsiveness.
Prototype-based
Javascript follows ‘Object.prototype’ functions instead of class inheritance.
Nullish Coalescing Operator (??)
The nullish coalescing operator returns the right side operand if the left side operand is null. If the left operand is not ‘null’, the operator returns the left side operand value. This operator helps to avoid Boolean operator errors.
Logical nullish assignment (??=)
It is the shorthand of
Simple client-side Calculations
Javascript can execute simple client-side calculations on the browser.
Large Browser Control
Javascript gives priority to the browser over the server.
Date and Time Handling
Javascript has built-in functions for getting ‘date’ and time.
HTML Content Generation
Javascript allows users to add dynamic HTML content upon doing some action on the page.
The Browser And OS Detection
Javascript has built-in code to detect the browser that the user uses.
Let & Const Keywords
Javascript replaces the var keyword with the let and const keywords and has a block-level scope.
Arrow Functions
Javascript helps to optimize syntax in anonymous functions with the arrow function syntax.
Template Literal
Javascript permits saving a variable as a string and saves development time.
New Array Functions
Javascript array functions enable code optimization. The regular array has an integer index, and the associative array has string index.
Default Parameters
Javascript avoids error scenarios with undefined values using the default parameters.
Property Shorthand
Javascript has several shorthand methods like .get() that saves coding time and cost.
Similar Syntax of Java
Javascript syntax and Java syntax are more similar, and it helps developers to work in both programming languages.
If else Statement
Javascript ‘if else’ conditional statements perform logical operations.
Looping Statements
Javascript loops allow developers to run the same code multiple times using a loop.
BigInt
Javascript allows large integer values. Javascript engines support BigInt differently.
Dynamic Import
The Javascript dynamic import function allows adding any files at run time.
Promise.allSettled
Javascript Promise.allSettled method accepts the promise array only after resolving or rejecting all the promises.
String matchAll
Javascript string.matchAll() returns all the match groups in a regular expression.
globalThis
Javascript globalThis points to the global object without considering the window object or self-object.
Conclusion
Javascript has unique features as well as the features of Object-oriented programming and Java language. All the features discussed and the remaining features make Javascript a powerful programming language.