ngTagsInput issue with ng-invalid style - ng-tags-input

Question

I'm using https://github.com/mbenford/ngTagsInput.
I created a basic form with a url and a tag-input field that is required.
Since it's required, i used the attribute min-tags="1"
I used it in conjonction with bootstrap stylehseet.
When displayed, the field appears with a red shadow border (since it is empty), even before any submit of the form. This is really annoying, is there any workaround ?
Validate the field only after form submission ?
Removing min-tags="1" and find another way to check the required aspect.
Playing with css to discard those styles applied to this .ng-invalid .tags
Thank you
Edit :
sample code :
<tags-input min-tags="1" ng-model="mytags"></tags-input>
Have done a plunker : http://plnkr.co/edit/EQcYfr4vLpkeJESho3GL?p=preview

Answer 1

You can simply use a custom class to handle the pristine state:
CSS
.custom-tags.ng-pristine .tags {
box-shadow: inset 0 1px 1px rgba(0,0,0,.075);
border: 1px solid #ccc
}
HTML
<tags-input min-tags="1" ng-model="mytags" class="custom-tags"></tags-input>
Working Plunker
Also, Angular 1.3 isn't officially supported yet. This is particularly important here because both pristine and dirty states won't be correctly set if you use that version of the framework.