rollup.config.dev.js

import babel from '@rollup/plugin-babel'
import commonjs from '@rollup/plugin-commonjs'
import json from '@rollup/plugin-json'
import resolve from '@rollup/plugin-node-resolve'
import serve from 'rollup-plugin-serve'

const extensions = ['.ts']

export default {
  input: './src/index.ts',
  output: {
    file: './dist/home-assistant-sun-card.js',
    format: 'cjs'
  },
  plugins: [
    resolve({ extensions }),
    commonjs(),
    json(),
    babel({extensions, include: ['src/**/*'], babelHelpers: 'bundled'}),
    serve({
      contentBase: ['dev/', 'dist/'],
      host: '0.0.0.0',
      port: 5000,
      allowCrossOrigin: true,
      headers: {
        'Access-Control-Allow-Origin': '*',
      },
    })
  ]
}