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What is JavaScript?

JavaScript is a text-based programming language that operates on both the client side and the server side in order to make web pages interactive. While CSS and HTML provide web pages with static contents, including the style and structure that appear on the page, JavaScript enables dynamic changing of these contents and enriches the user experience with advanced, interactive features.

Why is JavaScript used?
Answer Part 1

JavaScript is a text-based programming language that allows interactive elements to function on web pages.

Answer Part 2

The programming language allows developers to create unique, client-side scripts that enable the dynamism and interactivity of web elements. Developers can also write server-side code in JavaScript through the use of cross-platform engines like Node.js. Some basic examples of JavaScript at work include playing and pausing video embedded on a page and activating drop-down navigation menus. 

Developers often use front-end frameworks, such as React, Angular and Vue, when building web and mobile applications to reduce programming time and potential errors by importing prewritten code that executes common functionalities and components . These frameworks contain collections of code libraries that developers can use to streamline their workflow by reusing code that others have already created. Frameworks allow applications to remain manageable when scaling up while increasing collaboration between developers.

Is Python better than Javascript?
Answer Part 1

JavaScript remains the more popular programming language with many advantages, but Python presents other advantages that JavaScript lacks. In the end, which language is better depends on a website's particular needs.

Answer Part 2

JavaScript remains the more popular programming language with many advantages, but Python presents other advantages that JavaScript lacks. In the end, which language is better depends on a website's particular needs.

Python generally presents less of a learning curve than JavaScript for those early in their programming careers. Where Python falls short, however, is in its scalability. Python does not support asynchronous programming, but Node.js does, allowing it to handle a large number of users as well as large volumes of data with minimal server usage. Python is only able to accomplish cooperative multitasking through the use of coroutines.

Ultimately, whether Python or JavaScript is better for development depends on the kind of website being built, including its functionality and purpose, as well as a developer's particular skill set. For example, a front-end developer may be able to use JavaScript on the back-end as well without constraints, but if the application or website requires machine learning features, Python would be preferable due to the numerous libraries available to reduce programming workflows and ensure functionality.

Is JavaScript front-end or backend?
Answer Part 1

JavaScript is used across the entire web development stack, meaning that it has both front-end and back-end applications.

Answer Part 2

JavaScript is perhaps most commonly recognized as a front-end programming language dedicated to adding interactivity to web and mobile apps, but it has a wide range of backend development applications as well.

One of the most popular JavaScript runtime environments is Node.js, which can be used to build web servers and develop back-end infrastructure. By using Node.js, back-end developers can create support for data updates from the front-end, read front-end data, delete front-end data and build scalable network applications. Similar to front-end development, frameworks such as Express, which is based on Node.js, can be helpful for the back-end. Developers can also use frameworks such as Next.js, Gatsby, Meteor and for back-end development, depending on use cases. Express is useful for building web servers; Gatsby is a front-end framework used for generating static web pages; Next and Meteor are full-stack frameworks that can accomplish front and back-end development of the same technique through server-side rendering, which improves response time.

Courses

JavaScript Courses to Boost Your Skills

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Learn top JavaScript skills and boost your capabilities with Udemy’s courses.

Topic:

Discover the modern implementation of design patterns in JavaScript

 

What you'll learn:

  • Recognize and apply design patterns

  • Refactor existing…

4.5
(873)

Topic:

In only seven hours you will learn enough javascript to transform from a Junior JS Dev into a Senior JS Guru

 

What you'll learn:

  • Impress interviewers with…

4.5
(6821)

Topic:

Learn and build projects with pure JavaScript (No frameworks or libraries)

 

What you'll learn:

  • Modular learning sections & 10 real world projects with pure…

4.7
(27759)

Topic:

An advanced JavaScript course for everyone! Scope, closures, prototypes, 'this', build your own framework, and more.

 

What you'll learn:

  • Grasp how Javascript…

4.7
(43370)
Certifications

JavaScript Certifications to Expand Your Career

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Expand your career opportunities by earning a JavaScript certification from Udacity.

The goal of the Intermediate JavaScript Nanodegree program is to prepare students for roles in web development, server-side application development, and desktop development that require a more advanced set of JavaScript skills. This program will also prepare students with the skills required to use JavaScript frameworks like React, Angular, and Vue.

Intermediate
3 months
10 hours

You’ll master the skills necessary to become a successful full stack developer. Learn how to build UI and UX, create APIs and server side business logic and develop the persistence layer to store, process and retrieve data.

Intermediate
4 months
10 hours
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Brief History of Javascript
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