Rollup v4 Example

This example demonstrates usage with Rollup 4.x (latest version).

Features Tested

• Multi-line license banner
• Dynamic banner from package.json
• Source map support

Configuration

import { readFileSync } from 'node:fs'
import addBanner from 'rollup-plugin-add-banner'

const pkg = JSON.parse(readFileSync('package.json', 'utf-8'))

export default {
  input: 'src/index.js',
  output: {
    file: 'dist/index.js',
    format: 'es',
    sourcemap: true
  },
  plugins: [
    addBanner({
      content: `
/*!
 * ${pkg.name} v${pkg.version}
 * (c) ${new Date().getFullYear()} ${pkg.author}
 * Released under the MIT License.
 */`.trim()
    })
  ]
}

Source Code

src/index.js

/**
 * Example library
 * Built with rollup-plugin-add-banner
 */

export function greet(name) {
  return `Hello, ${name}!`
}

export function getVersion() {
  return '1.0.0'
}

Try It

cd examples/rollup-v4
pnpm install
pnpm run build
cat dist/index.js

Output

/*!
 * example-rollup-v4 v1.0.0
 * (c) 2024 saqqdy
 * Released under the MIT License.
 */
/**
 * Example library
 * Built with rollup-plugin-add-banner
 */

export function greet(name) {
  return `Hello, ${name}!`
}

export function getVersion() {
  return '1.0.0'
}
//# sourceMappingURL=index.js.map

Try Online

Open in StackBlitz