[Answer]-Django bootstrap modal after form submission

If I understand correctly, after the contact form is submitted you want a modal to appear saying thanks.

Instead of:

return HttpResponseRedirect('/thanks/')

Do:

import json
...
return HttpResponse(json.dumps({"success":True}), content_type="application/json")

And in your JS that submits the form check the response for success before reloading the HTML form:

if (typeof jqXhr.success != 'undefined') {
    $('#success-modal').modal('show');
} else {
    $('#my-form').html(jqXhr);
}