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Top 7 JavaScript Trends to Watch and Apply in 2021

JavaScript continues to be one of the most known and studied programming languages in 2020. According to the Stack Overflow survey, JavaScript heads the list as the most popular technology. Almost 70% of professional developers use this programming language worldwide. Its popularity is determined by its simplicity and a broad range of applications developed with JavaScript, starting from web development to non-browser environments.

In the upcoming year, JavaScript is expected to remain at its peak, and JavaScript development services will be in demand. In this article, we look into the top 7 JavaScript trends to watch and apply in 2021 and explain why you need to implement them in your projects.

#1 Typescript Will Keep Its Hype

Although TypeScript appeared in the distant 2012, it’s been a hype programming language in 2019-2020. TypeScript works as an extension of JavaScript that allows building complex apps both for a client and server-side execution. Many software developers enjoy TypeScript as it is strongly typed, easy to read, and simple to debug. It supports a wide range of IDEs and can be converted into JavaScript at any time.

Stack Overflow ranked Typescript as one of the top three most loved programming languages. And according to GitHub statistics, it’ll continue to gain popularity together with its community expansion.

#2 React.js Will Stay Popular

JavaScript offers a wide choice of frameworks for fast and effective application development. Therefore, software developers can get confused about which one suits best for a particular project. Many of them opt for React.js as it allows building robust and easy-to-scale web and mobile solutions.

In Stack Overflow rating, React.js takes the top place. According to nmp trends, React.js is gaining popularity among app developers, reaching 9 million downloads by November 2020.

There is a great number of famous web and mobile apps built with React.js such as Facebook, Instagram, Netflix, WhatsApp, Discovery, NY Times, and many others. React.js continues to develop, adding new features in its set and attracting a wider audience. Therefore, in 2021 we expect even more apps that have React.js in their core.

#3 Vue.js Will Continue to Rise

Vue.js is a recently emerged JavaScript framework. It was first released in 2014 and since then it’s been spreading rather quickly among web application developers. In 2019, Stack Overflow put it in second place among the most wanted web development frameworks, and nmp trends states that there were almost 2 million Vue.js downloads in November 2020.

Xiaomi and Alibaba have earned Vue.js high regard among software developers. It’s user-friendly, highly customizable, and easy to integrate into other frameworks. With Vue.js software developers can build user interfaces and single-page apps. It’s much simpler to utilize than Angular, therefore, app developers often prefer to use Vue to build their web solutions.

According to Web Technology Surveys, Vue.js use is growing. Now, it’s easy to find a Vue.js development company that is ready to provide you with effective and stable apps developed with this framework. Therefore, we expect that Vue.js is highly likely to stay with us in 2021.

#4 AngularJS Will Keep Developing

AngularJS is one of the most comprehensive JavaScript frameworks that stays popular among software developers. Although it can be slow to deploy and may seem a bit bulky it offers a well-thought-out functionality with MVC architecture for building robust single-page applications.

In 2019 this framework had its 8th release with a valuable set of extra features. It includes differential loading and lazy loading that make web apps faster, the ability to create web workers with the CLI that enhances web development, a new deprecation guide for developers to easily keep track of features and APIs, and much more.

Stack Overflow ranges this framework 3-rd most attractive among web development frameworks. And Built With states that there are about 3.7 million sites built in Angular globally.

#5 PWAs Are Gaining Popularity

PWAs are gaining popularity and more and more businesses are willing to develop them. According to Statista, 24% of e-commerce companies are planning to invest in PWAs, while 11% already use this solution.

Progressive web applications (PWAs) are accessible on wireless gadgets such as mobile phones and tablets. They work as common websites though behave like mobile apps. Software developers use web building technologies such as HTML, CSS, and JavaScript to develop PWAs.

PWAs have many advantages. They are multiplatform, easily adapt to various gadget screen sizes, automatically update, work offline, establish secure connections for data exchange, and many other features.

Some companies have already tried PWAs and remained satisfied with the results, Uber, Twitter, Pinterest are among them. They’ve managed to attract more customers, increase revenue from monthly visits, and much more.

#6 SPAs Are on the Rise

Single Page Applications (SPAs) are a new way to navigate web pages on wireless gadgets. SPAs allow using web pages without their reloading, as a result, users gain a more dynamic experience.

To build SPAs, web developers use standard web technologies such as JavaScript, HTML, CSS, AngularJS, React.js., or Vue.js.The most popular SPA examples are LinkedIn, Airbnb, Facebook, Gmail, and others.

Among other advantages of SPAs that make them a trend in 2021 are:

  • prolonging battery time;
  • enhanced user experience;
  • quick page navigation;
  • better caching;
  • easy to develop and maintain.

#7 AMP Will Add to Download Speed

According to Web Technology Surveys, AMP pages are higher in popularity. The trend is continuing to rise and we expect that AMP will expand its influence even more by 2021.

Accelerated Mobile Pages technology was developed by Google to make web pages download faster. For this, Google provides software developers with ready-made unchangeable JavaScript code and HTML and CSS frameworks. Google restricts custom JavaScript in their AMP pages as it’s often a slowing factor for loading speed.

There are a number of sites that already use AMP, including Twitter, The Guardian, CNBC, Gizmodo, and others.

Apart from fast page loading, AMP has some more benefits:

  • improved SEO as AMP pages are prioritized by Google;
  • users spend more time on-site as they don’t wait much for a page to load;
  • better monetization due to improved usability of images and banners in HTML code;
  • easier to spot as Google showcases pages on the Google Search Top Stories сarousel, as a result, the AMP content is shown in Google search first.


JavaScript is a robust and widely applicable programming language. It has a well-developed JavaScript ecosystem and it offers a wide range of tech solutions, especially in the web development field.

With the further evolution of the web, we expect that new JavaScript technologies will help this programming language to keep the leading position in software development charts in 2021.

Author Bio

Alex Burets Head of Web Development Department
Alex has 19 years of experience in software development, delivering new and innovative solutions for a myriad of different companies, ranging from small startups to large-scale enterprises with massive programming needs. His main focus areas are web development, front-end development, and eCommerce solutions.

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