onSubmit function ✓ 100.0%

function onSubmit(e: Event): void {
  const form = e.target as HTMLFormElement;
  if (!session || session.status !== "recording") return;
  if (isExtensionUI(form)) return;

  // Snapshot all current field values into the recording (captures values that
  // were pre-filled, auto-filled, or set by Fill All and thus never triggered
  // an 'input' event).
  captureUnrecordedFormFields(form);

  const lastStep = session.steps[session.steps.length - 1];
  // Avoid duplicate if we already captured the submit button click
  if (lastStep?.type === "submit" && now() - lastStep.timestamp < 200) return;

  const action = form.getAttribute("action");
  addStep(
    buildStep("submit", form, {
      url: action ?? undefined,
      label: "Form submit",
    }),
  );

  // Persist the session to sessionStorage so it survives a traditional
  // (non-AJAX) form submit that causes a full page navigation.
  persistSession();
}