Never forget type=”button” on generated buttons!
From [Lea Verou](http://lea.verou.me/2018/05/never-forget-typebutton-on-generated-buttons/
): http://lea.verou.me/2018/05/never-forget-typebutton-on-generated-buttons/
Always add type="button"
to <button>
!
And then it dawned on me: <button> elements with no type attribute set are submit buttons by default!