Use vite for build

.vite/build.ts

@@ -0,0 +1,81 @@
+import { build, InlineConfig } from 'vite';
+import { resolve } from 'path';
+import { fileURLToPath } from 'url';
+import jisonPlugin from './jisonPlugin.js';
+import pkg from '../package.json' assert { type: 'json' };
+import { OutputOptions } from 'vite/node_modules/rollup';
+const { dependencies } = pkg;
+const watch = process.argv.includes('--watch');
+const __dirname = fileURLToPath(new URL('.', import.meta.url));
+
+interface BuildOptions {
+  minify: boolean | 'esbuild';
+  core?: boolean;
+  watch?: boolean;
+}
+
+export const getBuildConfig = ({ minify, core, watch }: BuildOptions): InlineConfig => {
+  const external = ['require', 'fs', 'path'];
+  let output: OutputOptions | OutputOptions[] = [
+    {
+      name: 'mermaid',
+      format: 'esm',
+      sourcemap: true,
+      entryFileNames: `[name].esm${minify ? '.min' : ''}.mjs`,
+    },
+    {
+      name: 'mermaid',
+      format: 'umd',
+      sourcemap: true,
+      entryFileNames: `[name]${minify ? '.min' : ''}.js`,
+    },
+  ];
+
+  if (core) {
+    external.push(...Object.keys(dependencies));
+    output = {
+      name: 'mermaid',
+      format: 'esm',
+      sourcemap: true,
+      entryFileNames: `[name].core.mjs`,
+    };
+  }
+
+  const config: InlineConfig = {
+    configFile: false,
+    build: {
+      emptyOutDir: false,
+      lib: {
+        entry: resolve(__dirname, '../src/mermaid.ts'),
+        name: 'mermaid',
+        // the proper extensions will be added
+        fileName: 'mermaid',
+      },
+      minify,
+      rollupOptions: {
+        external,
+        output,
+      },
+    },
+    resolve: {
+      extensions: ['.jison', '.js', '.ts', '.json'],
+    },
+    plugins: [jisonPlugin()],
+  };
+
+  if (watch && config.build) {
+    config.build.watch = {
+      include: 'src/**',
+    };
+  }
+
+  return config;
+};
+
+if (watch) {
+  build(getBuildConfig({ minify: false, watch }));
+} else {
+  build(getBuildConfig({ minify: false }));
+  build(getBuildConfig({ minify: 'esbuild' }));
+  build(getBuildConfig({ minify: true, core: true }));
+}