Revert fileExists

1 files changed, 16 insertions, 6 deletions

diff --git a/webAO/utils/fileExists.ts b/webAO/utils/fileExists.ts
index f1a9924..abb2928 100644
--- a/webAO/utils/fileExists.ts
+++ b/webAO/utils/fileExists.ts
@@ -1,9 +1,19 @@
 export default async function fileExists(url: string): Promise<boolean> {
-    return fetch(url, {
-        method: 'HEAD',
-    }).then((response) => {
-        return response.ok;
-    }).catch(() => {
-        return false;
+    return new Promise((resolve) => {
+        const xhr = new XMLHttpRequest();
+        xhr.open('HEAD', url);
+        xhr.onload = function checkLoad() {
+            if (xhr.readyState === 4) {
+                if (xhr.status === 200) {
+                    resolve(true);
+                } else {
+                    resolve(false);
+                }
+            }
+        };
+        xhr.onerror = function checkError() {
+            resolve(false);
+        };
+        xhr.send(null);
     });
 }