first commit.

docs/.vitepress/theme/components/py.ts

@@ -0,0 +1,24 @@
+const worker = new Worker("/worker.js")
+
+const callbacks = {}
+
+worker.onmessage = (event) => {
+  const { id, ...data } = event.data
+  const onSuccess = callbacks[id]
+  delete callbacks[id]
+  onSuccess(data)
+}
+
+const asyncRun = (() => {
+  let id = 0 // identify a Promise
+  return (python: string, input: string) => {
+    // the id could be generated more carefully
+    id = (id + 1) % Number.MAX_SAFE_INTEGER
+    return new Promise<{ result: string; error: string }>((onSuccess) => {
+      callbacks[id] = onSuccess
+      worker.postMessage({ python, input, id })
+    })
+  }
+})()
+
+export { asyncRun }