1 files changed, 19 insertions, 0 deletions
diff --git a/webAO/utils/fileExists.ts b/webAO/utils/fileExists.ts
new file mode 100644
index 0000000..abb2928
--- /dev/null
+++ b/webAO/utils/fileExists.ts
@@ -0,0 +1,19 @@
+export default async function fileExists(url: string): Promise<boolean> {
+    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);
+    });
+}