vite-patterns

Topics in the source

• Vite Patterns
• When to Use
• How It Works
• Examples
• Config Structure
• Basic Config
• Conditional Config
• Key Config Options

Build tool and dev server patterns for Vite 8+ projects. Covers configuration, environment variables, proxy setup, library mode, dependency pre-bundling, and common production pitfalls. Configuring vite.config.ts or vite.config.js Setting up environment variables or .env files Configuring dev server proxy for API backends Optimizing build output (chunks, minification, assets) Publishing libraries with build.lib Troubleshooting dependency pre-bundling or CJS/ESM interop Debugging HMR, dev server, or build errors Choosing or ordering Vite plugins Dev mode serves source files as native ESM — no bundling. Transforms happen on-demand per module request, which is why cold starts are fast and HMR is precise. Build mode uses Rolldown (v7+) or Rollup (v5–v6) to bundle the app for production with tree-shaking, code-splitting, and Oxc-based minification. Dependency pre-bundling converts CJS/UMD deps to ESM once via esbuild and caches the result under nodemodules/.vite, so subsequent starts skip the work. Plugins share a unified interface across dev and build — the same plugin object works for both the dev server's on-demand transforms and the production pipeline. Environment variables are sta

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