"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getDefaultFormSubmitter = getDefaultFormSubmitter;
/**
 * Returns the default button a browser uses for implicit form submission.
 *
 * This is useful for custom form controls that need to mirror native Enter key behavior.
 * Clicking the returned submitter preserves browser semantics such as the submitter's click
 * event, `SubmitEvent.submitter`, and submitter-specific attributes.
 *
 * The function follows the controls exposed by `form.elements`, which includes controls associated
 * through the `form` attribute. Disabled submitters can be returned because the default button is
 * determined before disabled state is considered; clicking a disabled submitter is a no-op.
 */
function getDefaultFormSubmitter(form) {
  if (!form) {
    return null;
  }
  for (const candidate of form.elements) {
    const tagName = candidate.tagName;
    if (tagName === 'BUTTON' || tagName === 'INPUT') {
      const button = candidate;

      // Intentionally excludes input[type="image"]: Chromium omits it from form.elements,
      // so supporting it would require separate traversal for an exotic submitter type.
      if (button.type === 'submit') {
        return button;
      }
    }
  }
  return null;
}