Fallback to form.submit if requestSubmit isn't available.

Closes #397.

Author: ciscoheat

CHANGELOG.md

@@ -11,6 +11,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - [SuperDebug](https://superforms.rocks/super-debug) support for `Map` and `Set`.
 
+### Fixed
+
+- `submit` method now falls back to submit, if no support for requestSubmit in browser.
+
 ## [2.12.2] - 2024-03-29
 
 ### Fixed

src/lib/client/superForm.ts

@@ -2100,6 +2100,10 @@ export function superForm<
 				);
 			}
 
+			if (!form.requestSubmit) {
+				return form.submit();
+			}
+
 			const isSubmitButton =
 				submitter &&
 				((submitter instanceof HTMLButtonElement && submitter.type == 'submit') ||