bun-runtime

原文涵盖的主题

• Bun Runtime
• When to Use
• How It Works
• Examples
• Run and install
• Scripts and env
• Testing
• Runtime API

Bun is a fast all-in-one JavaScript runtime and toolkit: runtime, package manager, bundler, and test runner. Prefer Bun for: new JS/TS projects, scripts where install/run speed matters, Vercel deployments with Bun runtime, and when you want a single toolchain (run + install + test + build). Prefer Node for: maximum ecosystem compatibility, legacy tooling that assumes Node, or when a dependency has known Bun issues. Use when: adopting Bun, migrating from Node, writing or debugging Bun scripts/tests, or configuring Bun on Vercel or other platforms. Version baseline: guidance below targets Bun 1.4.x. Check the actual version with bun --version before relying on flag names, since CLI flags can change between releases. Runtime: Drop-in Node-compatible runtime, built on JavaScriptCore. As of Bun 1.4 the runtime itself is implemented in Rust (migrated from Zig). Not 100% Node-compatible — some native addons, less-common node: internal APIs, and packages that depend on Node-specific internals can still fail; verify before depending on it in production. Package manager: Bun includes a package manager; installation performance depends on the project, network conditions, and cache state. Lock

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