chore: Add esbuild (Breaking change)

mermaid.min.js and mermaid.js will now be IIFE instead of UMD.

.esbuild/util.ts

@@ -0,0 +1,81 @@
+import { resolve } from 'path';
+import { fileURLToPath } from 'url';
+import type { BuildOptions } from 'esbuild';
+import { readFileSync } from 'fs';
+import jsonSchemaPlugin from './jsonSchemaPlugin.js';
+import { packageOptions } from '../.build/common.js';
+import { jisonPlugin } from './jisonPlugin.js';
+
+const __dirname = fileURLToPath(new URL('.', import.meta.url));
+
+interface MermaidBuildOptions {
+  minify: boolean;
+  core?: boolean;
+  metafile?: boolean;
+  format?: 'esm' | 'iife';
+  entryName: keyof typeof packageOptions;
+}
+
+const buildOptions = (override: BuildOptions): BuildOptions => {
+  return {
+    bundle: true,
+    minify: true,
+    keepNames: true,
+    platform: 'browser',
+    tsconfig: 'tsconfig.json',
+    resolveExtensions: ['.ts', '.js', '.json', '.jison', '.yaml'],
+    external: ['require', 'fs', 'path'],
+    outdir: 'dist',
+    plugins: [jisonPlugin, jsonSchemaPlugin],
+    sourcemap: 'external',
+    ...override,
+  };
+};
+
+export const getBuildConfig = ({
+  minify,
+  core,
+  entryName,
+  metafile,
+  format,
+}: MermaidBuildOptions): BuildOptions => {
+  const external: string[] = ['require', 'fs', 'path'];
+  const { name, file, packageName } = packageOptions[entryName];
+  let output: BuildOptions = buildOptions({
+    absWorkingDir: resolve(__dirname, `../packages/${packageName}`),
+    entryPoints: {
+      [`${name}${core ? '.core' : format === 'iife' ? '' : '.esm'}${
+        minify ? '.min' : ''
+      }`]: `src/${file}`,
+    },
+    metafile,
+    logLevel: 'info',
+  });
+
+  if (core) {
+    const { dependencies } = JSON.parse(
+      readFileSync(resolve(__dirname, `../packages/${packageName}/package.json`), 'utf-8')
+    );
+    // Core build is used to generate file without bundled dependencies.
+    // This is used by downstream projects to bundle dependencies themselves.
+    // Ignore dependencies and any dependencies of dependencies
+    external.push(...Object.keys(dependencies));
+    output.external = external;
+  }
+
+  if (format === 'iife') {
+    output.format = 'iife';
+    output.splitting = false;
+    output.globalName = '__esbuild_esm_mermaid';
+    output.footer = {
+      js: 'globalThis.mermaid = globalThis.__esbuild_esm_mermaid.default;',
+    };
+    output.outExtension = { '.js': '.js' };
+  } else {
+    output.format = 'esm';
+    output.splitting = true;
+    output.outExtension = { '.js': '.mjs' };
+  }
+
+  return output;
+};