separate node esm and browser esm builds

d2js/js/.gitignore

@@ -2,6 +2,7 @@ node_modules
 .npm
 bun.lockb
 
+src/wasm-loader.browser.js
 wasm/d2.wasm
 dist/
 

d2js/js/build.js

@@ -1,35 +1,110 @@
 import { build } from "bun";
-import { copyFile, mkdir } from "node:fs/promises";
+import { copyFile, mkdir, writeFile, readFile, rm } from "node:fs/promises";
-import { join } from "node:path";
+import { join, resolve } from "node:path";
 
-await mkdir("./dist/esm", { recursive: true });
+const __dirname = new URL(".", import.meta.url).pathname;
-await mkdir("./dist/cjs", { recursive: true });
+const ROOT_DIR = resolve(__dirname);
+const SRC_DIR = resolve(ROOT_DIR, "src");
+
+await rm("./dist", { recursive: true, force: true });
+await mkdir("./dist/browser", { recursive: true });
+await mkdir("./dist/node-esm", { recursive: true });
+await mkdir("./dist/node-cjs", { recursive: true });
+
+const wasmBinary = await readFile("./wasm/d2.wasm");
+const wasmExecJs = await readFile("./wasm/wasm_exec.js", "utf8");
+
+await writeFile(
+  join(SRC_DIR, "wasm-loader.browser.js"),
+  `export const wasmBinary = Uint8Array.from(atob("${Buffer.from(wasmBinary).toString(
+    "base64"
+  )}"), c => c.charCodeAt(0));
+   export const wasmExecJs = ${JSON.stringify(wasmExecJs)};`
+);
 
 const commonConfig = {
-  target: "node",
   splitting: false,
   sourcemap: "external",
   minify: true,
-  naming: {
+};
-    entry: "[dir]/[name].js",
+
-    chunk: "[name]-[hash].js",
+async function buildPlatformFile(platform) {
-    asset: "[name]-[hash][ext]",
+  const platformContent =
+    platform === "node"
+      ? "export * from './platform.node.js';"
+      : "export * from './platform.browser.js';";
+
+  const platformPath = join(SRC_DIR, "platform.js");
+  await writeFile(platformPath, platformContent);
+}
+
+async function buildAndCopy(buildType) {
+  const configs = {
+    browser: {
+      outdir: resolve(ROOT_DIR, "dist/browser"),
+      format: "esm",
+      target: "browser",
+      platform: "browser",
+      loader: {
+        ".js": "jsx",
+      },
+      entrypoints: [
+        resolve(SRC_DIR, "index.js"),
+        resolve(SRC_DIR, "worker.js"),
+        resolve(SRC_DIR, "platform.js"),
+        resolve(SRC_DIR, "wasm-loader.browser.js"),
+      ],
+    },
+    "node-esm": {
+      outdir: resolve(ROOT_DIR, "dist/node-esm"),
+      format: "esm",
+      target: "node",
+      platform: "node",
+      entrypoints: [
+        resolve(SRC_DIR, "index.js"),
+        resolve(SRC_DIR, "worker.js"),
+        resolve(SRC_DIR, "platform.js"),
+      ],
+    },
+    "node-cjs": {
+      outdir: resolve(ROOT_DIR, "dist/node-cjs"),
+      format: "cjs",
+      target: "node",
+      platform: "node",
+      entrypoints: [
+        resolve(SRC_DIR, "index.js"),
+        resolve(SRC_DIR, "worker.js"),
+        resolve(SRC_DIR, "platform.js"),
+      ],
     },
   };
 
-async function buildAndCopy(format) {
+  const config = configs[buildType];
-  const outdir = `./dist/${format}`;
+  await buildPlatformFile(config.platform);
 
-  await build({
+  const result = await build({
     ...commonConfig,
-    entrypoints: ["./src/index.js", "./src/worker.js", "./src/platform.js"],
+    ...config,
-    outdir,
-    format,
   });
 
-  await copyFile("./wasm/d2.wasm", join(outdir, "d2.wasm"));
+  if (!result.outputs || result.outputs.length === 0) {
-  await copyFile("./wasm/wasm_exec.js", join(outdir, "wasm_exec.js"));
+    throw new Error(`No outputs generated for ${buildType} build`);
   }
 
-await buildAndCopy("esm");
+  if (buildType !== "browser") {
-await buildAndCopy("cjs");
+    await copyFile(resolve(ROOT_DIR, "wasm/d2.wasm"), join(config.outdir, "d2.wasm"));
+    await copyFile(
+      resolve(ROOT_DIR, "wasm/wasm_exec.js"),
+      join(config.outdir, "wasm_exec.js")
+    );
+  }
+}
+
+try {
+  await buildAndCopy("browser");
+  await buildAndCopy("node-esm");
+  await buildAndCopy("node-cjs");
+} catch (error) {
+  console.error("Build failed:", error);
+  process.exit(1);
+}

d2js/js/package.json

@@ -2,10 +2,10 @@
   "name": "@terrastruct/d2",
   "author": "Terrastruct, Inc.",
   "description": "D2.js is a wrapper around the WASM build of D2, the modern text-to-diagram language.",
-  "version": "0.1.0",
+  "version": "0.1.11",
   "repository": {
     "type": "git",
-    "url": "https://github.com/terrastruct/d2.git",
+    "url": "git+https://github.com/terrastruct/d2.git",
     "directory": "d2js/js"
   },
   "bugs": {
@@ -20,8 +20,10 @@
   "module": "./dist/esm/index.js",
   "exports": {
     ".": {
-      "import": "./dist/esm/index.js",
+      "browser": "./dist/browser/index.js",
-      "require": "./dist/cjs/index.js"
+      "import": "./dist/node-esm/index.js",
+      "require": "./dist/node-cjs/index.js",
+      "default": "./dist/node-esm/index.js"
     }
   },
   "files": [
@@ -33,7 +35,7 @@
     "test:integration": "bun test test/integration",
     "test:all": "bun run test && bun run test:integration",
     "dev": "bun --watch dev-server.js",
-    "prepublishOnly": "./make.sh"
+    "prepublishOnly": "./make.sh all"
   },
   "keywords": [
     "d2",
@@ -43,9 +45,6 @@
     "text-to-diagram",
     "go"
   ],
-  "engines": {
-    "bun": ">=1.0.0"
-  },
   "license": "MPL-2.0",
   "devDependencies": {
     "bun": "latest"

d2js/js/src/index.js

@@ -50,7 +50,7 @@ export class D2 {
 
     if (isNode) {
       this.worker.on("error", (error) => {
-        console.error("Worker encountered an error:", error.message || error);
+        console.error("Worker (node) encountered an error:", error.message || error);
       });
     } else {
       this.worker.onerror = (error) => {

d2js/js/src/platform.browser.js

@@ -0,0 +1,29 @@
+import { wasmBinary, wasmExecJs } from "./wasm-loader.browser.js";
+
+export async function loadFile(path) {
+  console.log("loading " + path);
+  if (path === "./d2.wasm") {
+    return wasmBinary.buffer;
+  }
+  if (path === "./wasm_exec.js") {
+    return new TextEncoder().encode(wasmExecJs).buffer;
+  }
+  throw new Error(`Unexpected file request: ${path}`);
+}
+
+export async function createWorker() {
+  // Combine wasmExecJs with worker script
+  const workerResponse = await fetch(new URL("./worker.js", import.meta.url));
+  if (!workerResponse.ok) {
+    throw new Error(
+      `Failed to load worker.js: ${workerResponse.status} ${workerResponse.statusText}`
+    );
+  }
+  const workerJs = await workerResponse.text();
+
+  const blob = new Blob(["(() => {", wasmExecJs, "})();", workerJs], {
+    type: "application/javascript",
+  });
+
+  return new Worker(URL.createObjectURL(blob));
+}

d2js/js/src/platform.js

@@ -1,37 +1 @@
-export async function loadFile(path) {
+export * from "./platform.node.js";
-  if (typeof window === "undefined") {
-    const fs = await import("node:fs/promises");
-    const { fileURLToPath } = await import("node:url");
-    const { join, dirname } = await import("node:path");
-    const __dirname = dirname(fileURLToPath(import.meta.url));
-
-    try {
-      return await fs.readFile(join(__dirname, path));
-    } catch (err) {
-      if (err.code === "ENOENT") {
-        return await fs.readFile(join(__dirname, "../wasm", path.replace("./", "")));
-      }
-      throw err;
-    }
-  }
-  try {
-    const response = await fetch(new URL(path, import.meta.url));
-    return await response.arrayBuffer();
-  } catch {
-    const response = await fetch(
-      new URL(`../wasm/${path.replace("./", "")}`, import.meta.url)
-    );
-    return await response.arrayBuffer();
-  }
-}
-
-export async function createWorker() {
-  if (typeof window === "undefined") {
-    const { Worker } = await import("node:worker_threads");
-    const { fileURLToPath } = await import("node:url");
-    const { join, dirname } = await import("node:path");
-    const __dirname = dirname(fileURLToPath(import.meta.url));
-    return new Worker(join(__dirname, "worker.js"));
-  }
-  return new window.Worker(new URL("./worker.js", import.meta.url));
-}

d2js/js/src/platform.node.js

@@ -0,0 +1,40 @@
+let nodeModules = null;
+
+async function loadNodeModules() {
+  if (!nodeModules) {
+    nodeModules = {
+      fs: await import("fs/promises"),
+      path: await import("path"),
+      url: await import("url"),
+      worker: await import("worker_threads"),
+    };
+  }
+  return nodeModules;
+}
+
+export async function loadFile(path) {
+  const modules = await loadNodeModules();
+  const readFile = modules.fs.readFile;
+  const { join, dirname } = modules.path;
+  const { fileURLToPath } = modules.url;
+  const __dirname = dirname(fileURLToPath(import.meta.url));
+
+  try {
+    return await readFile(join(__dirname, path));
+  } catch (err) {
+    if (err.code === "ENOENT") {
+      return await readFile(join(__dirname, "../../../wasm", path.replace("./", "")));
+    }
+    throw err;
+  }
+}
+
+export async function createWorker() {
+  const modules = await loadNodeModules();
+  const { Worker } = modules.worker;
+  const { join, dirname } = modules.path;
+  const { fileURLToPath } = modules.url;
+  const __dirname = dirname(fileURLToPath(import.meta.url));
+  const workerPath = join(__dirname, "worker.js");
+  return new Worker(workerPath);
+}

d2js/js/src/wasm-loader.node.js

@@ -0,0 +1,8 @@
+import { readFile } from "fs/promises";
+import { fileURLToPath } from "url";
+import { dirname, resolve } from "path";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+export async function getWasmBinary() {
+  return readFile(resolve(__dirname, "./d2.wasm"));
+}

d2js/js/src/worker.js

@@ -27,8 +27,6 @@ async function handleMessage(e) {
       try {
         if (isNode) {
           eval(data.wasmExecContent);
-        } else {
-          importScripts(data.wasmExecUrl);
         }
         d2 = await initWasm(data.wasm);
         currentPort.postMessage({ type: "ready" });

d2js/js/test/integration/cjs.test.js

@@ -2,7 +2,7 @@ import { expect, test, describe } from "bun:test";
 
 describe("D2 CJS Integration", () => {
   test("can require and use CJS build", async () => {
-    const { D2 } = require("../../dist/cjs/index.js");
+    const { D2 } = require("../../dist/node-cjs/index.js");
     const d2 = new D2();
     const result = await d2.compile("x -> y");
     expect(result.diagram).toBeDefined();

d2js/js/test/integration/esm.test.js

@@ -1,5 +1,5 @@
 import { expect, test, describe } from "bun:test";
-import { D2 } from "../../dist/esm/index.js";
+import { D2 } from "../../dist/node-esm/index.js";
 
 describe("D2 ESM Integration", () => {
   test("can import and use ESM build", async () => {

d2js/js/test/unit/basic.test.js

@@ -1,5 +1,5 @@
 import { expect, test, describe } from "bun:test";
-import { D2 } from "../../src/index.js";
+import { D2 } from "../../dist/node-esm/index.js";
 
 describe("D2 Unit Tests", () => {
   test("basic compilation works", async () => {