Sapper

Sapper is a universal web application framework and server-side rendering framework for Svelte. It enables the development of applications that render views on the server for fast initial loads and hydrate them on the client for subsequent interactivity.

The project features a file-based routing engine that maps URL paths to components based on the file system structure. It also functions as a static site generator, exporting production-ready HTML, CSS, and JavaScript files for hosting in environments without a live server.

The framework covers full-stack development capabilities, including the creation of server routes for API endpoints, shared layouts for consistent navigation, and universal data fetching. It manages performance and security through code-splitting, prefetching, and the configuration of content security policies.

Features

Universal Web Frameworks - Provides a full-stack environment for building applications that render on both the server and the client.

Isomorphic Rendering - Renders HTML on the server for fast initial loads and hydrates it on the client for interactivity.

File-Based Routing - Maps URL paths to Svelte components automatically based on the project's directory structure.

Static Exports - Converts dynamic application routes into a set of static files for simple hosting.

Full-Stack Web Development - Enables the creation of both frontend user interfaces and backend API endpoints within a single codebase.

File-System Based Routing - Maps URL paths to Svelte components based on the project's file system structure.

File-System Routing - Automatically maps directory structures to application navigation paths and dynamic URL parameters.

File-System Routing Engines - Uses a routing engine that derives application navigation directly from the directory and file hierarchy.

Pre-Render Data Loaders - Executes data loading logic before component instantiation to prevent layout shifts and ensure server-side readiness.

Server-Side Rendering - Renders HTML on the server for the initial request and hydrates it on the client for interactivity.

Server-Side Rendering Frameworks - Serves as a comprehensive framework for building Svelte applications with server-side rendering and client-side hydration.

Static Site Generation - Compiles server-side rendered pages into standalone HTML files for hosting on static providers.

Universal Rendering Frameworks - Enables the creation of web applications that utilize server-side rendering, client-side hydration, and static generation.

JSON State Synchronization - Synchronizes server-side data with client-side stores using embedded JSON payloads in the initial HTML response.

Asset Delivery Optimization - Implements code-splitting and asset optimization to reduce initial load times and improve resource delivery.

Page Navigation Prefetching - Provides capabilities to load route code and data before navigation to eliminate perceived latency.

Single Page Applications - Implements client-side navigation to allow seamless page transitions without full browser reloads.

API Servers - Allows the creation of server-side API endpoints using modules that handle HTTP requests and responses.

Client-side Routing - Provides a mechanism to intercept browser navigation for seamless view transitions without full page reloads.

Universal Data Fetching Utilities - Provides utilities to execute HTTP requests on both server and client while maintaining session credentials.

Data Preloading - Fetches required information in parallel with navigation to prevent layout shifts during rendering.

Code Splitting - Implements code-splitting to divide the application into smaller, on-demand JavaScript bundles for optimized loading.

Client-Side Navigation Management - Controls view transitions and browser history programmatically to create a seamless single-page experience.

Shared Layouts - Provides structural components that wrap multiple routes to maintain consistent navigation bars and footers.

Static Site Generators - Exports production-ready static HTML, CSS, and JavaScript files for hosting without a live server.

sveltejssapperArchived

Features

Star history