rollup.config.ts

import resolve from 'rollup-plugin-node-resolve'
import commonjs from 'rollup-plugin-commonjs'
import sourceMaps from 'rollup-plugin-sourcemaps'
import camelCase from 'lodash.camelcase'
import typescript from 'rollup-plugin-typescript2'
import json from 'rollup-plugin-json'
import { terser } from 'rollup-plugin-terser'

const pkg = require('./package.json')

const libraryName = 'chart-js-fabric'

export default {
  input: `src/${libraryName}.ts`,
  output: [
    {
      file: pkg.main,
      name: camelCase(libraryName),
      format: 'umd',
      sourcemap: true,
      globals: {
        fabric: 'fabric',
        'chart.js': 'Chart'
      }
    },
    {
      file: pkg.module,
      format: 'es',
      sourcemap: true,
      plugins: [terser()]
    },
    {
      file: pkg.module.replace(/\.js$/, '.min.js'),
      format: 'es',
      sourcemap: true,
      plugins: [terser()]
    }
  ],

  // Indicate here external modules you don't wanna include in your bundle (i.e.: 'lodash')
  external: ['fabric', 'chart.js'],
  watch: {
    include: 'src/**'
  },
  plugins: [
    // Allow json resolution
    json(),
    // Compile TypeScript files
    typescript({ useTsconfigDeclarationDir: true }),
    // Allow bundling cjs modules (unlike webpack, rollup doesn't understand cjs)
    commonjs({
      include: 'node_modules/**'
    }),
    // Allow node_modules resolution, so you can use 'external' to control
    // which external modules to include in the bundle
    // https://github.com/rollup/rollup-plugin-node-resolve#usage
    resolve(),

    // Resolve source maps to the original source
    sourceMaps()
  ]
}