diff --git a/.prettierignore b/.prettierignore
index 6b44e5f0b..4cfcedd6e 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -5,3 +5,4 @@ d2renderers/d2latex/polyfills.js
 d2renderers/d2latex/setup.js
 d2renderers/d2sketch/rough.js
 lib/png/generate_png.js
+d2js
diff --git a/d2js/js/.prettierignore b/d2js/js/.prettierignore
new file mode 100644
index 000000000..96bbfb74b
--- /dev/null
+++ b/d2js/js/.prettierignore
@@ -0,0 +1 @@
+src/platform.browser.js
diff --git a/d2js/js/build.js b/d2js/js/build.js
index a3d3a145f..d8ae1969a 100644
--- a/d2js/js/build.js
+++ b/d2js/js/build.js
@@ -23,7 +23,6 @@ await writeFile(
 );
 
 const commonConfig = {
-  sourcemap: "external",
   minify: true,
 };
 
@@ -54,10 +53,7 @@ async function buildAndCopy(buildType) {
       format: "esm",
       target: "browser",
       platform: "browser",
-      loader: {
-        ".js": "jsx",
-      },
-      entrypoints: [resolve(SRC_DIR, "index.js"), resolve(SRC_DIR, "worker.js")],
+      entrypoints: [resolve(SRC_DIR, "index.js")],
     },
     "node-esm": {
       outdir: resolve(ROOT_DIR, "dist/node-esm"),
@@ -86,7 +82,9 @@ async function buildAndCopy(buildType) {
   });
 
   if (!result.outputs || result.outputs.length === 0) {
-    throw new Error(`No outputs generated for ${buildType} build`);
+    throw new Error(
+      `No outputs generated for ${buildType} build. Result: ${JSON.stringify(result)}`
+    );
   }
 
   if (buildType !== "browser") {
diff --git a/d2js/js/package.json b/d2js/js/package.json
index 535b1c938..1836dba84 100644
--- a/d2js/js/package.json
+++ b/d2js/js/package.json
@@ -2,7 +2,7 @@
   "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": "0.1.19",
+  "version": "0.1.20",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/terrastruct/d2.git",
diff --git a/d2js/js/src/platform.browser.js b/d2js/js/src/platform.browser.js
index 052149742..2f71daaf8 100644
--- a/d2js/js/src/platform.browser.js
+++ b/d2js/js/src/platform.browser.js
@@ -1,4 +1,5 @@
 import { wasmBinary, wasmExecJs } from "./wasm-loader.browser.js";
+import workerScript from "./worker.js" with { type: "text" };
 
 export async function loadFile(path) {
   if (path === "./d2.wasm") {
@@ -11,13 +12,6 @@ export async function loadFile(path) {
 }
 
 export async function createWorker() {
-  let response = await fetch(new URL("./worker.js", import.meta.url));
-  if (!response.ok)
-    throw new Error(
-      `Failed to load worker.js: ${response.status} ${response.statusText}`
-    );
-  let workerScript = await response.text();
-
   let blob = new Blob([wasmExecJs, workerScript], {
     type: "text/javascript;charset=utf-8",
   });
diff --git a/d2js/js/src/worker.browser.js b/d2js/js/src/worker.browser.js
index 361432b0d..5fa95510f 100644
--- a/d2js/js/src/worker.browser.js
+++ b/d2js/js/src/worker.browser.js
@@ -1,4 +1,55 @@
-import { setupMessageHandler } from "./worker.shared.js";
+let currentPort;
+let d2;
+
+export function setupMessageHandler(isNode, port, initWasm) {
+  currentPort = port;
+
+  const handleMessage = async (e) => {
+    const { type, data } = e;
+
+    switch (type) {
+      case "init":
+        try {
+          if (isNode) {
+            eval(data.wasmExecContent);
+          }
+          d2 = await initWasm(data.wasm);
+          currentPort.postMessage({ type: "ready" });
+        } catch (err) {
+          currentPort.postMessage({ type: "error", error: err.message });
+        }
+        break;
+
+      case "compile":
+        try {
+          const result = await d2.compile(JSON.stringify(data));
+          const response = JSON.parse(result);
+          if (response.error) throw new Error(response.error.message);
+          currentPort.postMessage({ type: "result", data: response.data });
+        } catch (err) {
+          currentPort.postMessage({ type: "error", error: err.message });
+        }
+        break;
+
+      case "render":
+        try {
+          const result = await d2.render(JSON.stringify(data));
+          const response = JSON.parse(result);
+          if (response.error) throw new Error(response.error.message);
+          currentPort.postMessage({ type: "result", data: atob(response.data) });
+        } catch (err) {
+          currentPort.postMessage({ type: "error", error: err.message });
+        }
+        break;
+    }
+  };
+
+  if (isNode) {
+    port.on("message", handleMessage);
+  } else {
+    port.onmessage = (e) => handleMessage(e.data);
+  }
+}
 
 async function initWasmBrowser(wasmBinary) {
   const go = new Go();
diff --git a/d2js/js/src/worker.node.js b/d2js/js/src/worker.node.js
index 0f65334ef..ff7d9ec08 100644
--- a/d2js/js/src/worker.node.js
+++ b/d2js/js/src/worker.node.js
@@ -1,5 +1,57 @@
 import { parentPort } from "node:worker_threads";
-import { setupMessageHandler } from "./worker.shared.js";
+
+let currentPort;
+let d2;
+
+export function setupMessageHandler(isNode, port, initWasm) {
+  currentPort = port;
+
+  const handleMessage = async (e) => {
+    const { type, data } = e;
+
+    switch (type) {
+      case "init":
+        try {
+          if (isNode) {
+            eval(data.wasmExecContent);
+          }
+          d2 = await initWasm(data.wasm);
+          currentPort.postMessage({ type: "ready" });
+        } catch (err) {
+          currentPort.postMessage({ type: "error", error: err.message });
+        }
+        break;
+
+      case "compile":
+        try {
+          const result = await d2.compile(JSON.stringify(data));
+          const response = JSON.parse(result);
+          if (response.error) throw new Error(response.error.message);
+          currentPort.postMessage({ type: "result", data: response.data });
+        } catch (err) {
+          currentPort.postMessage({ type: "error", error: err.message });
+        }
+        break;
+
+      case "render":
+        try {
+          const result = await d2.render(JSON.stringify(data));
+          const response = JSON.parse(result);
+          if (response.error) throw new Error(response.error.message);
+          currentPort.postMessage({ type: "result", data: atob(response.data) });
+        } catch (err) {
+          currentPort.postMessage({ type: "error", error: err.message });
+        }
+        break;
+    }
+  };
+
+  if (isNode) {
+    port.on("message", handleMessage);
+  } else {
+    port.onmessage = (e) => handleMessage(e.data);
+  }
+}
 
 async function initWasmNode(wasmBinary) {
   const go = new Go();
diff --git a/d2js/js/src/worker.shared.js b/d2js/js/src/worker.shared.js
deleted file mode 100644
index bbd1293e8..000000000
--- a/d2js/js/src/worker.shared.js
+++ /dev/null
@@ -1,52 +0,0 @@
-let currentPort;
-let d2;
-
-export function setupMessageHandler(isNode, port, initWasm) {
-  currentPort = port;
-
-  const handleMessage = async (e) => {
-    const { type, data } = e;
-
-    switch (type) {
-      case "init":
-        try {
-          if (isNode) {
-            eval(data.wasmExecContent);
-          }
-          d2 = await initWasm(data.wasm);
-          currentPort.postMessage({ type: "ready" });
-        } catch (err) {
-          currentPort.postMessage({ type: "error", error: err.message });
-        }
-        break;
-
-      case "compile":
-        try {
-          const result = await d2.compile(JSON.stringify(data));
-          const response = JSON.parse(result);
-          if (response.error) throw new Error(response.error.message);
-          currentPort.postMessage({ type: "result", data: response.data });
-        } catch (err) {
-          currentPort.postMessage({ type: "error", error: err.message });
-        }
-        break;
-
-      case "render":
-        try {
-          const result = await d2.render(JSON.stringify(data));
-          const response = JSON.parse(result);
-          if (response.error) throw new Error(response.error.message);
-          currentPort.postMessage({ type: "result", data: atob(response.data) });
-        } catch (err) {
-          currentPort.postMessage({ type: "error", error: err.message });
-        }
-        break;
-    }
-  };
-
-  if (isNode) {
-    port.on("message", handleMessage);
-  } else {
-    port.onmessage = (e) => handleMessage(e.data);
-  }
-}