Option Platform

tsdown --platform node     # Default
tsdown --platform browser
tsdown --platform neutral

export default defineConfig({
  entry: ['src/index.ts'],
  platform: 'browser',
})

export default defineConfig({
  entry: ['src/index.ts'],
  platform: 'node',
})

export default defineConfig({
  entry: ['src/index.ts'],
  platform: 'browser',
  format: ['esm'],
})

export default defineConfig({
  entry: ['src/index.ts'],
  platform: 'neutral',
  format: ['esm'],
})

export default defineConfig({
  entry: ['src/index.ts'],
  format: ['cjs'],
  platform: 'browser',  // Ignored for CJS
})

Help: The "main" field here was ignored. Main fields must be configured
explicitly when using the "neutral" platform.

export default defineConfig({
  platform: 'neutral',
  inputOptions: {
    resolve: {
      mainFields: ['module', 'main'],
    },
  },
})

export default defineConfig({
  entry: ['src/cli.ts'],
  format: ['esm'],
  platform: 'node',
  shims: true,
})

export default defineConfig({
  entry: ['src/index.ts'],
  format: ['iife'],
  platform: 'browser',
  globalName: 'MyLib',
  minify: true,
})

export default defineConfig({
  entry: ['src/index.ts'],
  format: ['esm'],
  platform: 'neutral',
  inputOptions: {
    resolve: {
      mainFields: ['module', 'main'],
    },
  },
})

export default defineConfig({
  entry: ['src/index.tsx'],
  format: ['esm', 'cjs'],
  platform: 'browser',
  deps: {
    neverBundle: ['react', 'react-dom'],
  },
})

export default defineConfig([
  {
    entry: ['src/index.ts'],
    format: ['esm', 'cjs'],
    platform: 'node',
  },
  {
    entry: ['src/browser.ts'],
    format: ['esm'],
    platform: 'browser',
  },
])

Warning: Module "fs" has been externalized for browser compatibility

export default defineConfig({
  platform: 'neutral',
  inputOptions: {
    resolve: {
      mainFields: ['module', 'browser', 'main'],
      conditions: ['import', 'require'],
    },
  },
})