support sub path

src/lib/web.ts

@@ -0,0 +1,10 @@
+export function getBasePath(): string {
+    const path = window.location.pathname;
+    const lastSlashIndex = path.lastIndexOf('/');
+
+    if (lastSlashIndex < 0) {
+        return path;
+    }
+
+    return path.substring(0, lastSlashIndex);
+}