app/views/devise/registrations/new.html.erb
<script src="https://res.wx.qq.com/open/js/jweixin-1.6.0.js"></script>
<%= wechat_config_js debug: false, api: %w(closeWindow) -%>
<div class="weui-msg">
<div class="weui-msg__text-area">
<h1 class="weui-msg__title">Sign Up</h1>
</div>
</div>
<%= form_for(resource, as: resource_name, url: registration_path(resource_name)) do |f| %>
<div class="weui-cells_title">Following fields is required</div>
<div class="weui-cells weui-cells_form">
<div class="weui-cell">
<div class="weui-cell__hd">
<%= f.label :birthday, class: 'weui-label' %>
</div>
<div class="weui-cell__bd weui-cell_primary">
<%= f.date_field :birthday, class: 'weui-input' %>
</div>
</div>
</div>
<div class="weui-btn-area">
<%= f.submit "Confirm", class: 'weui-btn weui-btn_primary' %>
<a href="javascript:wx.closeWindow();" class="weui-btn weui-btn_plain-default">Close</a>
</div>
<% end %>