Introduction/API Reference/ConfigurationConfigurationTypeScriptNext.js provides a TypeScript-first development experience for building your React application.ESLintLearn how to use and configure the ESLint plugin to catch common issues and problems in a Next.js application.next.config.jsLearn how to configure your application with next.config.js.userAgentThe userAgent helper extends the Web Request API with additional properties and methods to interact with the user agent object from the request.TypeScriptNext.js provides a TypeScript-first development experience for building your React application.