diff --git a/extra/js/drive.js b/extra/js/drive.js
index 54391c3..ed8748f 100644
--- a/extra/js/drive.js
+++ b/extra/js/drive.js
@@ -18,3 +18,46 @@ function _base64ToBytes(base64) {
     }
     return bytes;
 }
+
+window.loadFileAsync = function(fullPath, callback) {
+    // Make cache object
+    if (!window.fileAsyncCache) window.fileAsyncCache = {};
+
+    // Check if already loaded
+    if (window.fileAsyncCache.hasOwnProperty(fullPath)) return callback();
+
+    // Show spinner
+    if (window.setBusy) window.setBusy();
+
+    // Get mapping key
+    const mappingKey = fullPath.toLowerCase().replace(new RegExp("\\.[^/.]+$"), "");
+    const mappingValue = mapping[mappingKey];
+
+    // Check if this is a folder
+    if (!mappingValue || mappingValue.endsWith("h=")) {
+        console.error("Skipping loading", fullPath, mappingValue);
+        return callback();
+    }
+
+    // Get target URL
+    const iurl = "gameasync/" + mappingValue;
+
+    // Get path and filename
+    const path = "/game/" + mappingValue.substring(0, mappingValue.lastIndexOf("/"));
+    const filename = mappingValue.substring(mappingValue.lastIndexOf("/") + 1).split("?")[0];
+
+    // Delete original file if existent
+    try {
+        FS.unlink(path + "/" + filename);
+    } catch (err) {}
+
+    // Get the new file
+    getLazyAsset(iurl, filename, () => {
+        FS.createPreloadedFile(path, filename, iurl, true, true, function() {
+            window.fileAsyncCache[fullPath] = 1;
+            if (window.setNotBusy) window.setNotBusy();
+            if (window.fileLoadedAsync) window.fileLoadedAsync(fullPath);
+            callback();
+        }, console.error);
+    });
+}
diff --git a/src/emscripten.cpp b/src/emscripten.cpp
index 5a8dd8e..9fa1317 100644
--- a/src/emscripten.cpp
+++ b/src/emscripten.cpp
@@ -4,49 +4,7 @@
 
 EM_JS(void, load_file_async_js, (const char* fullPathC), {
 	Asyncify.handleSleep(function(wakeUp) {
-		// Get argument
-		const fullPath = UTF8ToString(fullPathC);
-
-		// Make cache object
-		if (!window.fileAsyncCache) window.fileAsyncCache = {};
-
-		// Check if already loaded
-		if (window.fileAsyncCache.hasOwnProperty(fullPath)) return wakeUp();
-
-		// Show spinner
-		if (window.setBusy) window.setBusy();
-
-		// Get mapping key
-		const mappingKey = fullPath.toLowerCase().replace(new RegExp("\\\\.[^/.]+$"), "");
-		const mappingValue = mapping[mappingKey];
-
-		// Check if this is a folder
-		if (!mappingValue || mappingValue.endsWith("h=")) {
-			console.error("Skipping loading", fullPath, mappingValue);
-			return wakeUp();
-		}
-
-		// Get target URL
-		const iurl = "gameasync/" + mappingValue;
-
-		// Get path and filename
-		const path = "/game/" + mappingValue.substring(0, mappingValue.lastIndexOf("/"));
-		const filename = mappingValue.substring(mappingValue.lastIndexOf("/") + 1).split("?")[0];
-
-		// Delete original file if existent
-		try {
-			FS.unlink(path + "/" + filename);
-		} catch (err) {}
-
-		// Get the new file
-		getLazyAsset(iurl, filename, () => {
-			FS.createPreloadedFile(path, filename, iurl, true, true, function() {
-				window.fileAsyncCache[fullPath] = 1;
-				if (window.setNotBusy) window.setNotBusy();
-				if (window.fileLoadedAsync) window.fileLoadedAsync(fullPath);
-				wakeUp();
-			}, console.error);
-		});
+    	window.loadFileAsync(UTF8ToString(fullPathC), wakeUp);
 	});
 });