gh-126691: Remove --with-emscripten-target (#126787)

This unifies the code for nodejs and the code for the browser. After this
commit, the browser example doesn't work; this will be fixed in a
subsequent update.

2 files changed, 8 insertions, 8 deletions

diff --git a/Tools/wasm/README.md b/Tools/wasm/README.md
index 4c9a643..3f4211f 100644
--- a/Tools/wasm/README.md
+++ b/Tools/wasm/README.md
@@ -21,12 +21,6 @@ https://github.com/psf/webassembly for more information.
 
 ### Build
 
-For now the build system has two target flavors. The ``Emscripten/browser``
-target (``--with-emscripten-target=browser``) is optimized for browsers.
-It comes with a reduced and preloaded stdlib without tests and threading
-support. The ``Emscripten/node`` target has threading enabled and can
-access the file system directly.
-
 To cross compile to the ``wasm32-emscripten`` platform you need
 [the Emscripten compiler toolchain](https://emscripten.org/), 
 a Python interpreter, and an installation of Node version 18 or newer. Emscripten
diff --git a/Tools/wasm/emscripten/node_pre.js b/Tools/wasm/emscripten/node_pre.js
index 3490d3c..54b09dc 100644
--- a/Tools/wasm/emscripten/node_pre.js
+++ b/Tools/wasm/emscripten/node_pre.js
@@ -1,9 +1,15 @@
 // If process is undefined, we're not running in the node runtime let it go I
 // guess?
 if (typeof process !== "undefined") {
-    const nodeVersion = Number(process.versions.node.split('.',1)[0]);
+    const nodeVersion = Number(process.versions.node.split(".", 1)[0]);
     if (nodeVersion < 18) {
-        process.stderr.write(`Node version must be >= 18, got version ${process.version}\n`);
+        process.stderr.write(
+            `Node version must be >= 18, got version ${process.version}\n`,
+        );
         process.exit(1);
     }
+    Module.preRun = () => {
+        FS.mkdirTree("/lib/");
+        FS.mount(NODEFS, { root: __dirname + "/lib/" }, "/lib/");
+    };
 }