stackblitz/webcontainer-core

Features

• Browser-Based Execution Environments - Provides a full-stack, browser-based execution environment that simulates an operating system to run server-side code.
• Browser-Based Runtimes - Provides a full-stack server runtime that executes directly within a web browser environment.
• Virtual Filesystems - Implements a POSIX-compliant virtual filesystem that allows browser-based applications to manage project files and monitor changes.
• Virtualized Filesystem Layers - Simulates a POSIX-compliant file system in memory to allow server-side tools to read and write files.
• Client-Side Development Environments - Provides the infrastructure to execute build toolchains and servers in a browser tab, eliminating the need for remote virtual machines.
• Cloud IDEs - Provides the underlying runtime for online code editors that manage virtual filesystems and execute toolchains.
• Browser-Based Development Environments - Provides full stack coding environments that run entirely in the browser to remove the need for local installations.
• Shell Command Execution - Enables the execution of system processes and shell commands within the browser environment.
• Browser-Based Shell Execution - Implements a system for spawning command-line processes and executing shell commands directly within the browser.
• Zero-Install Workflows - Implements zero-install workflows by providing an immediate, operational development environment directly in the browser.
• In-Browser Process Management - Manages the lifecycle of multiple concurrent command-line processes and their standard input and output streams.
• Browser-Based System Call Interceptors - Maps standard operating system calls to WebAssembly functions to execute binary toolchains within the browser sandbox.
• Node.js Sandbox Runtimes - Initializes a full Node.js sandbox runtime using WebAssembly and a virtualized filesystem inside the browser.
• Toolchain Execution - Runs compilers and bundlers directly in the browser by leveraging a virtualized environment.
• Browser-side Execution Environments - Provides a browser-side execution environment to run server-side code and command-line tools without a remote backend.
• Virtual File Systems - Provides a virtual file system to create, read, write, and delete files or mount data sets.
• Local File Operations - Performs standard filesystem operations such as reading, writing, renaming, and deleting files and folders.
• Filesystem Change Monitors - Watches for modifications to specific files or directories to trigger automatic updates or reactions.
• Web Application Previews - Captures the URL of a running server and renders the output in a frame for live viewing.
• Registry Connections - Enables connecting to and installing dependencies from private corporate package registries within the browser runtime.
• Browser-Based Toolchain Execution - Runs build tools and module bundlers directly in the browser to enable interactive coding experiences.
• Process Execution - Provides utilities for spawning and managing the lifecycle of command-line processes within the virtualized runtime.
• Filesystem Mounting - Loads a directory tree or binary snapshot into the runtime to provide the initial set of project files.
• Live Preview Refreshing - Reloads preview frames via messaging or source resets to reflect recent changes in the browser environment.
• Network Request Interception - Captures requests from internal servers and routes them to a browser-accessible URL for live previewing.

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