Front-end ecosystem trends in 2024: What should we learn and prepare for?

The front-end development trend in 2024 can be summarized as a 'return to server-side rendering' and 'extreme performance optimization'. The four trends to learn and prepare for are React Server Components, Rust-based next-generation build tools, new frameworks such as Svelte, Qwik, and Astro, and TypeScript as the default.

Why does the front-end ecosystem keep changing so fast?

Among the web development fields, the front-end ecosystem changes at a dazzling speed. New frameworks and tools are constantly coming out, so much so that there is a joke that “the skills learned yesterday become legacy today.” After an era dominated by single page applications (SPAs), technologies to create a faster, search engine-friendly web are becoming mainstream.

What are React Server Components (RSC)?

React Server Components (RSC) are components that are executed and rendered only on the server, unlike existing React components that run and render in the browser (client). They are definitely the hottest topic in the front-end camp these days.

Why use Server Components?

• Zero Bundle Size: Code from the server component is not sent to the client. This dramatically reduces the size of the JavaScript bundle that the browser must download, dramatically improving initial loading speed (TTV).
• Direct backend resource access: You can retrieve data by directly accessing server infrastructure, such as databases or file systems. There is no need to create separate API endpoints, simplifying the structure.
• Enhanced Security: Since it runs only on the server, the risk of sensitive data or API keys being exposed to the client is fundamentally blocked.

Currently, RSC is being most actively introduced and applied in practice through App Router after Next.js version 13. In 2024, it will be essential for developers using React to have the ability to design architecture to decide when and how to use client and server components separately.

Which build tools are replacing Webpack?

Native language-based tools written in Rust and Go are rapidly replacing the JavaScript-based build tool market represented by Webpack. The goal is to fundamentally solve the slow build speed problem that occurs as project size increases.

• Vite's continued strength: Vite, based on native ES modules, is becoming the standard, pushing out CRA (Create React App) not only in Vue but also in the React ecosystem with its overwhelming development server operation speed.
• Turbopack & SWC: Next.js' Vercel puts Turbopack, a Rust-based bundler, and SWC, a compiler, at the forefront. It performs dozens of times faster than existing Webpack and is revolutionizing the development experience of large-scale projects.
• Rspack: A Rust-based bundler developed by ByteDance, it has recently received a lot of attention by maximizing performance while maintaining compatibility with the Webpack ecosystem (plugins, etc.).

Front-end developers should now actively adopt next-generation tools suited to the nature of their projects based on their understanding of build pipeline optimization.

Which new frameworks are rising beyond React and Vue?

Svelte, Qwik, and Astro are growing rapidly by aiming to overcome the limitations of existing SPA architecture, although React and Vue still dominate the market.

• Svelte: Compiles with code that directly updates the DOM according to state changes during the build phase, rather than using the Virtual DOM. It is very light and fast as there is no runtime overhead, and its fandom is steadily expanding due to its concise code.
• Qwik: Introduces a unique concept called 'Resumability'. The client displays HTML without executing JavaScript at all, and then executes only the portions of JavaScript that the user interacts with by lazy loading. This is called the ultimate in early loading performance optimization.
• Astro: A framework specialized in creating static websites using 'Islands Architecture'. Basically, it distributes pure HTML without JavaScript, and components such as React, Vue, and Svelte can be selectively combined only in specific parts (Islands) that require dynamic interaction, providing optimal performance for blogs and content-centered sites.

Since these tools each have their own clear philosophy and advantages, it has become important to have the insight to choose a framework that fits the purpose of the service rather than trying to solve all projects with React.

Is TypeScript now the default for front-end development?

Yes. To the extent that it is embarrassing to call it a trend anymore, TypeScript has now become the de facto standard of front-end development. Most new libraries and frameworks support TypeScript natively or are written in TypeScript.

In 2024, advanced type design capabilities will be required that go beyond simply specifying types and ensure type stability even in the runtime environment by combining complex use of generics, active use of utility types, and schema declaration/verification libraries such as Zod.

How should front-end developers prepare?

Build solid fundamentals first, then ride the new wave. There is no need to be anxious just because new technologies keep coming out. Ultimately, all frameworks and tools operate on 'the foundations of the JavaScript/TypeScript language' and 'the browser's rendering principles'. If you have a solid base, learning new trends isn't that difficult.

To be competitive as a front-end developer in 2024, we recommend actively considering the introduction of React's server component (Next.js) and next-generation build tools (Vite, etc.). Read the wave of technology and ride it to provide a faster and more user-friendly web experience.