Rename fileExists.js to fileExists.ts

1 files changed, 18 insertions, 0 deletions

diff --git a/webAO/utils/fileExists.ts b/webAO/utils/fileExists.ts
new file mode 100644
index 0000000..5b60976
--- /dev/null
+++ b/webAO/utils/fileExists.ts
@@ -0,0 +1,18 @@
+const fileExists = async (url) => 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);
+});
+export default fileExists;