vite.config.js

/*
Copyright 2022 Bonitasoft S.A.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

import path from 'node:path';

import { defineConfig } from 'vite';

export default defineConfig(({ mode }) => {
  // create the environment variable for configuration in the postcss config
  process.env['NODE_ENV'] = mode;

  return {
    server: {
      port: 10_001,
    },

    // Configuration to build the demo
    build: {
      outDir: 'build/demo',
      assetsDir: 'build/demo/dev/public/assets',
      rollupOptions: {
        input: {
          index: path.resolve(__dirname, 'dev/public/index.html'),
          'elements-identification': path.resolve(__dirname, 'dev/public/elements-identification.html'),
        },
        // No hash in asset names. We make the demo publicly available via the examples repository and served by statically.io
        // New versions are accessed using tags. The master branch is cached by statically.io and updated once a day.
        // see https://github.com/vitejs/vite/issues/378#issuecomment-768816653
        output: {
          entryFileNames: `dev/public/assets/[name].js`,
          chunkFileNames: `dev/public/assets/[name].js`,
          assetFileNames: `dev/public/assets/[name].[ext]`,
          // Put dependencies in dedicated files to track the impact of their updates on the demo.
          // Vite 8 (Rolldown) replaces the deprecated `manualChunks` with `codeSplitting.groups`.
          // Groups are evaluated in order: the first matching group captures the module.
          codeSplitting: {
            groups: [
              { name: 'lib-es-toolkit', test: id => id.includes('node_modules/es-toolkit') },
              { name: 'lib-fast-xml-parser', test: id => id.includes('node_modules/fast-xml-parser') },
              { name: 'lib-mxgraph', test: id => id.includes('node_modules/mxgraph') },
              // bpmn-visualization code built from src/
              { name: 'lib-bpmn-visualization', test: id => !id.includes('node_modules') && id.includes('/src/') },
            ],
          },
        },
      },
      // minify: false, // uncomment to see the code in clear
      // Vite 8 (Rolldown) switched the default minifier from esbuild to Oxc. With Vite 8.1.0, Oxc minifies the
      // regex/string-heavy fast-xml-parser code ~12 kB less effectively (53.38 kB vs 41.46 kB). Force terser (already a
      // devDependency) to keep the demo bundle sizes consistent with the esbuild output produced before Vite 8.
      minify: 'terser',
      chunkSizeWarningLimit: 836, // mxgraph
    },
    preview: {
      port: 10_002,
    },
  };
});