netteForms: do not propagate 'submit' event further when the form is invalid #342
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As reported in https://forum.nette.org/cs/36618-duplicitni-dialog-netteformsmodal-s-ajaxem-naja-js, when somebody uses netteForms and Naja (>= 3.2) together, and netteForms are loaded (and auto-initialized) before Naja, both libraries consecutively trigger the form validation, which results in duplicate dialogs when there are validation errors.
This change prevents the
submit
event from propagating even to other listeners attached to the same form and event.