How To Learn JavaScript (With Advantages And Functions)

By Indeed Editorial Team

Updated 21 August 2022 | Published 8 November 2021

Updated 21 August 2022

Published 8 November 2021

The Indeed Editorial Team comprises a diverse and talented team of writers, researchers and subject matter experts equipped with Indeed's data and insights to deliver useful tips to help guide your career journey.

JavaScript, or JS, is a free scripting language that enables system administrators and developers to implement complex features on webpages such as timely content, interactive 2D or 3D graphics and scrolling videos that draw users' attention and build retention. JS uses Hypertext Markup Language (HTML) and Cascading Style Sheets (CSS) to enhance code functionality using interactive features. With the rising demand for interactive web content, there are various resources and ways for you to learn this scripting language. In this article, we discuss how to learn JavaScript and skills that can help you succeed in a JavaScript career.

Related: What Is JavaScript?

How To Learn JavaScript?

Follow these steps to know how to learn JavaScript if you want to pursue a career as a JavaScript programmer, developer or systems administrator:

1. Enroll in online courses

As a JavaScript learner, you can consider enrolling in one of the many online courses available that provide you with beginner to advanced level training in the programming language. Online programming courses allow you to practice the skills you learn on a live webpage and enable you to receive instant feedback and scores to assess your performance. As a beginner, you can opt for various free online courses and then specialise in a domain of your interest by either enrolling in a free or paid course certification.

2. Self learn from books

There are many excellent JS books in the market that you can purchase and start developing your skills. Ask fellow JS learners, proficient JS programmers or developers in your social circle about the books they referred to enhance their scripting skills. Contrary to online interactive learning, books allow you to understand essential programming concepts such as strings, arrays, and loops and explain advanced concepts like jQuery and graphic creation.

3. Enroll in coding boot camps

If you seek guidance throughout your learning process, you can consider enrolling in a coding boot camp, a short-term, intense training program that provides you with real-life coding and developing skills. Young learners prefer boot camps over a traditional four-year degree to strengthen their core expertise and program understanding in a brief period without spending too much on a degree. These boot camps equip learners with marketable skills and can run for a few weeks or months, depending on the structure of the camp and whether it follows a full-time or part-time schedule.

Related: How To Become A Web Developer

4. Attend meetups and networking events

Attending networking and meetup events with expert JS professionals can help you learn the language from people who have the knowledge, skills and experience of using it for years. The educational learning and exposure to these events also give you the space to learn from your conversations with professionals. Speaking with expert developers, system administrators and programmers allows you to understand the strategies to boost your JavaScript learning process. It also enables you to avoid potential learning mistakes, such as dwelling too much on a coding problem that the final web program may not reflect.

5. Start practicing

Start practicing by creating and developing your coding projects and programs to test your abilities to create functional and interactive webpages. Practicing JS independently allows you to use skills learned through tutorials on real-life problems and code solutions to fix those issues. The first step to independent software or application development is going to come from practice. Start small and then continue building up your project to avoid getting overwhelmed by the creative process.

Related: Top 50 JavaScript Interview Questions and Answers

How Does JavaScript Work With Other Coding Languages?

JavaScript uses HTML and CSS to build a webpage's structure and content to create dynamic and interactive webpages and their elements. People are using JS increasingly because of the simplicity of coding and its ability to build complex and secure webpages quickly. It is also an excellent way for developers to express their creativity using the combination of languages like JS, HTML and CSS. To achieve this, programmers use JavaScript with these programming languages for the following purposes:

JavaScript and HTML

Programmers use HTML to build an outline to develop a webpage's content. JavaScript works with HTML and automatically updates and influences the HTML code based on a user's command, such as a mouse click or entering data in a web form. JS controls how a webpage interacts with or updates HTML content using these commands.

Related: HTML Interview Questions And Answers For Professionals

JavaScript and CSS

CSS outlines and enhances the visual elements on a webpage. CSS interacts with JavaScript and provides various guidelines on how JS can influence the webpage and its features. While HTML deals with a webpage's content, CSS changes the visual elements and outlook using various shapes, colours, styles and sizes. JS can only function within the boundaries set by the CSS code in a program.

Related: Essential CSS Interview Questions And Answers

Functions Of JavaScript

JavaScript is a full-stack programming language, which means it operates on both the client and server-side. You can use JavaScript to develop your program anytime you require your webpages to display more than just static information. Programmers and developers use JS to perform both complex and straightforward functions. Some tasks that JavaScript can perform are:

  • Reacting to mouse clicks and movements

  • Adding, changing, removing or updating HTML content on a webpage

  • Responding to typing

  • Uploading files

  • Downloading files

  • Storing data using cache

  • Interacting with site visitors

  • Sending and receiving messages

Programmers and developers combine these functions to create high-quality, interactive user content for webpages to enhance the user experience. JS also records any server issues or user errors that programmers can use to improve the code.

Related: How To Become A JavaScript Developer: A Step-By-Step Guide

Advantages Of Learning JavaScript

Some advantages of using JavaScript in web development include:

  • Ease of learning: Developers and programmers find JavaScript easy to learn as its commands are like the English language. Various online free resources and training programs ensure a learner experiences ease of learning through their interactive tutorial and practical training.

  • Low bandwidth requirements: JavaScript is one of the popular client-side scripting languages, so users provide the bandwidth to perform any function or operate the webpage. This feature ensures that there are low bandwidth requirements from the server-side that is running the page.

  • Fast processing: JavaScript has a quick processing system that allows the webpages to load quickly and interact with users. It changes the structure and improves a webpage's performance immediately after a user acts on the webpage.

  • Interoperability: JavaScript is a preferred option for developing webpages as it works well with a host of other programming languages like HTML and CSS. Programmers can easily use JS in the script of another programming language or within a webpage.

  • Rich interfaces: JavaScript offers a rich library of interfaces for web developers to create attractive and interactive webpages. These interfaces describe the wide range of shapes that JS objects can take.

  • Dynamic: Programmers use JavaScript for both front-end and back-end development. This feature makes it a dynamic scripting language that developers can use for various purposes.

Why Learn JavaScript?

If you want to become a web developer, programmer or systems administrator, knowing JavaScript can give you a competitive edge over others. The demand for JS in the programming market is high, so the possibility that you can get a JavaScript-related question in your developer job interview is higher. Learning JS is the first step to endless opportunities in the web development and programming domain. Some of the most common reasons students are keen to learn JavaScript are:

Related: What is Coding? A Complete Guide to Coding Languages

Versatility and simplicity

Most students want to learn JavaScript because of its versatility and simplicity in the coding process. Once you have mastered this scripting language, you can code either on the client-side, which is front-end development, or the server-side, which is back-end development. Knowledge of JavaScript also equips you to work in machine learning or develop mobile apps, webpages and desktop apps, which can be essential if you work in the system development, programming or administrative domain.

Related: Front End Developer Skills: Definition And Examples

In-demand language

The skills and expert knowledge of JavaScript can help you find a job in the web development industry, as it is one of the most sought-after programming languages in the world. The global demand for JS experts has outweighed the skilled talent available in the market. A career in JavaScript is in-demand and highly paid and fulfilling if you are interested in this language's challenges and opportunities.


JavaScript is a beginner-friendly language that is relatively easier to learn compared to other programming languages. It comes installed on every modern web browser, which means you can begin developing right away without setting up a development environment. Beginners prefer it also because it provides them with instant feedback, even with a minimal amount of code. They can immediately see results and determine if they want to change the code to improve the overall outlook of a webpage or application.

Please note that none of the companies mentioned in this article are affiliated with Indeed.

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