gh-127111: Apply prettier formatter to Emscripten web example (#127551)

Cleaned up formatting (and a stray closing tag) of the web example HTML and JS.

Tools/wasm/emscripten/web_example/python.worker.mjs

@@ -1,104 +1,109 @@
 import createEmscriptenModule from "./python.mjs";
 
 class StdinBuffer {
-    constructor() {
-        this.sab = new SharedArrayBuffer(128 * Int32Array.BYTES_PER_ELEMENT)
-        this.buffer = new Int32Array(this.sab)
-        this.readIndex = 1;
-        this.numberOfCharacters = 0;
-        this.sentNull = true
-    }
+  constructor() {
+    this.sab = new SharedArrayBuffer(128 * Int32Array.BYTES_PER_ELEMENT);
+    this.buffer = new Int32Array(this.sab);
+    this.readIndex = 1;
+    this.numberOfCharacters = 0;
+    this.sentNull = true;
+  }
 
-    prompt() {
-        this.readIndex = 1
-        Atomics.store(this.buffer, 0, -1)
-        postMessage({
-            type: 'stdin',
-            buffer: this.sab
-        })
-        Atomics.wait(this.buffer, 0, -1)
-        this.numberOfCharacters = this.buffer[0]
-    }
+  prompt() {
+    this.readIndex = 1;
+    Atomics.store(this.buffer, 0, -1);
+    postMessage({
+      type: "stdin",
+      buffer: this.sab,
+    });
+    Atomics.wait(this.buffer, 0, -1);
+    this.numberOfCharacters = this.buffer[0];
+  }
 
-    stdin = () => {
-        while (this.numberOfCharacters + 1 === this.readIndex) {
-            if (!this.sentNull) {
-                // Must return null once to indicate we're done for now.
-                this.sentNull = true
-                return null
-            }
-            this.sentNull = false
-            // Prompt will reset this.readIndex to 1
-            this.prompt()
-        }
-        const char = this.buffer[this.readIndex]
-        this.readIndex += 1
-        return char
+  stdin = () => {
+    while (this.numberOfCharacters + 1 === this.readIndex) {
+      if (!this.sentNull) {
+        // Must return null once to indicate we're done for now.
+        this.sentNull = true;
+        return null;
+      }
+      this.sentNull = false;
+      // Prompt will reset this.readIndex to 1
+      this.prompt();
     }
+    const char = this.buffer[this.readIndex];
+    this.readIndex += 1;
+    return char;
+  };
 }
 
 const stdout = (charCode) => {
-    if (charCode) {
-        postMessage({
-            type: 'stdout',
-            stdout: charCode,
-        })
-    } else {
-        console.log(typeof charCode, charCode)
-    }
-}
+  if (charCode) {
+    postMessage({
+      type: "stdout",
+      stdout: charCode,
+    });
+  } else {
+    console.log(typeof charCode, charCode);
+  }
+};
 
 const stderr = (charCode) => {
-    if (charCode) {
-        postMessage({
-            type: 'stderr',
-            stderr: charCode,
-        })
-    } else {
-        console.log(typeof charCode, charCode)
-    }
-}
+  if (charCode) {
+    postMessage({
+      type: "stderr",
+      stderr: charCode,
+    });
+  } else {
+    console.log(typeof charCode, charCode);
+  }
+};
 
-const stdinBuffer = new StdinBuffer()
+const stdinBuffer = new StdinBuffer();
 
 const emscriptenSettings = {
-    noInitialRun: true,
-    stdin: stdinBuffer.stdin,
-    stdout: stdout,
-    stderr: stderr,
-    onRuntimeInitialized: () => {
-        postMessage({type: 'ready', stdinBuffer: stdinBuffer.sab})
-    },
-    async preRun(Module) {
-        const versionHex = Module.HEAPU32[Module._Py_Version/4].toString(16);
-        const versionTuple = versionHex.padStart(8, "0").match(/.{1,2}/g).map((x) => parseInt(x, 16));
-        const [major, minor, ..._] = versionTuple;
-        // Prevent complaints about not finding exec-prefix by making a lib-dynload directory
-        Module.FS.mkdirTree(`/lib/python${major}.${minor}/lib-dynload/`);
-        Module.addRunDependency("install-stdlib");
-        const resp = await fetch(`python${major}.${minor}.zip`);
-        const stdlibBuffer = await resp.arrayBuffer();
-        Module.FS.writeFile(`/lib/python${major}${minor}.zip`, new Uint8Array(stdlibBuffer), { canOwn: true });
-        Module.removeRunDependency("install-stdlib");
-    }
-}
+  noInitialRun: true,
+  stdin: stdinBuffer.stdin,
+  stdout: stdout,
+  stderr: stderr,
+  onRuntimeInitialized: () => {
+    postMessage({ type: "ready", stdinBuffer: stdinBuffer.sab });
+  },
+  async preRun(Module) {
+    const versionHex = Module.HEAPU32[Module._Py_Version / 4].toString(16);
+    const versionTuple = versionHex
+      .padStart(8, "0")
+      .match(/.{1,2}/g)
+      .map((x) => parseInt(x, 16));
+    const [major, minor, ..._] = versionTuple;
+    // Prevent complaints about not finding exec-prefix by making a lib-dynload directory
+    Module.FS.mkdirTree(`/lib/python${major}.${minor}/lib-dynload/`);
+    Module.addRunDependency("install-stdlib");
+    const resp = await fetch(`python${major}.${minor}.zip`);
+    const stdlibBuffer = await resp.arrayBuffer();
+    Module.FS.writeFile(
+      `/lib/python${major}${minor}.zip`,
+      new Uint8Array(stdlibBuffer),
+      { canOwn: true },
+    );
+    Module.removeRunDependency("install-stdlib");
+  },
+};
 
 const modulePromise = createEmscriptenModule(emscriptenSettings);
 
-
 onmessage = async (event) => {
-    if (event.data.type === 'run') {
-        const Module = await modulePromise;
-        if (event.data.files) {
-            for (const [filename, contents] of Object.entries(event.data.files)) {
-                Module.FS.writeFile(filename, contents)
-            }
-        }
-        const ret = Module.callMain(event.data.args);
-        postMessage({
-            type: 'finished',
-            returnCode: ret
-        })
+  if (event.data.type === "run") {
+    const Module = await modulePromise;
+    if (event.data.files) {
+      for (const [filename, contents] of Object.entries(event.data.files)) {
+        Module.FS.writeFile(filename, contents);
+      }
     }
-}
-
+    const ret = Module.callMain(event.data.args);
+    postMessage({
+      type: "finished",
+      returnCode: ret,
+    });
+  }
+};