fix bug: a is not DOM element

resources/js/NewSignupPage.js

@@ -1,15 +1,16 @@
-/**
- * JavaScript file for performing some interactive and client-side validation of
- * the password fields on the registration form to avoid some user frustration,
- * especially on mobile devices.
- *
- * @file
- * @copyright Copyright © 2022- Qiuwen Baike Contributors
- */
-// Mandatory check
-(function () {
-	var a = document.getElementById("wpLoginAttempt") && !document.getElementById("wpOATHToken") || document.getElementById("wpCreateaccount");
-	a && (a.disabled = !0, document.getElementById("mw-input-wpTermsOfService").addEventListener("change", function () {
-		a.disabled = !0 === document.getElementById("mw-input-wpTermsOfService").checked ? !1 : !0;
-	}));
-})();
+/**
+ * JavaScript file for performing some interactive and client-side validation of
+ * the password fields on the registration form to avoid some user frustration,
+ * especially on mobile devices.
+ *
+ * @file
+ * @copyright Copyright © 2022- Qiuwen Baike Contributors
+ */
+// Mandatory check
+
+(function () {
+	var a = !document.getElementById("wpOATHToken") ? document.getElementById("wpLoginAttempt") || document.getElementById("wpCreateaccount") : false;
+		a && (a.disabled = !0, document.getElementById("mw-input-wpTermsOfService").addEventListener("change", function () {
+		a.disabled = !0 === document.getElementById("mw-input-wpTermsOfService").checked ? !1 : !0;
+	}));
+})();