Does not consider formactions on submit-buttons

[mertenhanisch]

Instead of the action declared in the form tag, an html-form can be submitted with another action, declared on the clicked submit-button: See here.
This tool uses only the action declared in the form tag when it is initialised. At that point in time we cannot know, though, with which action the form will be submitted.
I suggest binding eventlisteners on all submit-buttons of the form, that have a formaction attribute, and override the action attribute of the form, when triggered.
An easier workaround consists of 3 steps:

1. removing the this.action = formElement.action; from the "initialize" function
2. setting self.action = formElement.action in the submit callback of the script
3. on your submit-button set onclick="this.form.action='myAction'"