maybe fix

src/bun.js/module_loader.zig

@@ -2347,6 +2347,10 @@ pub const ModuleLoader = struct {
                     break :loader options.Loader.tsx;
                 }
 
+                if (strings.hasPrefixComptime(path.name.dir, "data:")) {
+                    break :loader options.Loader.tsx;
+                }
+
                 // Unknown extensions are to be treated as file loader
                 break :loader options.Loader.file;
             } else {

src/bundler.zig

@@ -1301,7 +1301,7 @@ pub const Bundler = struct {
                 break :brk logger.Source.initPathString(path.text, "");
             }
 
-            if (strings.startsWith(path.text, "data:")) {
+            if (strings.hasPrefixComptime(path.text, "data:")) {
                 const data_url = DataURL.parseWithoutCheck(path.text) catch |err| {
                     bundler.log.addErrorFmt(null, logger.Loc.Empty, bundler.allocator, "{s} parsing data url \"{s}\"", .{ @errorName(err), path.text }) catch {};
                     return null;

test/js/node/string-module.test.js

@@ -14,6 +14,12 @@ test("should import and execute ES module from string (base64)", async () => {
   expect(result).toEqual(2);
 });
 
+test("can import module with '.' in source code", async () => {
+  const code = `export default 1.1;`;
+  const mod = await import("data:text/javascript," + code).then(mode => mode.default);
+  expect(mod).toBe(1.1);
+});
+
 test("should throw when importing malformed string (base64)", async () => {
   expect(() => import("data:text/javascript;base64,asdasdasd")).toThrowError("Base64DecodeError");
 });