Add components without sending additional client-side JavaScript. Built on the latest React features.

Introduction. Welcome to the Next.js documentation! What is Next.js? Next.js is a React framework for building full-stack web applications. You use React Components to build user interfaces, and Next.js for additional features and optimizations.

New to React? Learn the foundational concepts to help you go from JavaScript to React.

Learn the fundamental JavaScript and React concepts that'll help you get started with Next.js.

Third-party JavaScript refers to any scripts that are added from a third-party source. Usually, third-party scripts are included in order to introduce newer functionality into a site that does not need to be written from scratch, such as analytics, ads, and customer support widgets.

Use placeholder data in JSON format or as JavaScript objects. Use a 3rd party service like mockAPI. For this project, we've provided some placeholder data in app/lib/placeholder-data.ts. Each JavaScript object in the file represents a table in …

3% – 8%+ Smaller Client-Side JavaScript Size; Redesigned Production Build CLI Output; New Built-In Polyfills: fetch(), URL, and Object.assign; Optimized Page Loading: Better FCP and TTI; Support for the Latest JavaScript Features; Zero-Config Deployment Support for next export Applications; React Strict Mode Compliance and Opt-In

Updating UI with Javascript In this chapter, we'll start building out our project by using JavaScript and DOM methods to add an h1 tag to your project. Open your code editor and create a new index.html file.

These scripts refer to the different stages of developing an application: next dev: Starts the development server.; next build: Builds the application for production.; next start: Starts the production server.; next lint: Runs ESLint.; Create the app directory. Next.js uses file-system routing, which means the routes in your application are …

The nice thing about React components is that they are just JavaScript. Let's see how you can write a React component, from a JavaScript perspective: Creating components. In React, components are functions. Inside your script tag, create a new function called header: