0
讓我先說我不知道前端開發什麼。我一直試圖以這種形式爲中心，感覺像永遠，但沒有任何工作。我正在使用Flask Bootstrap和WTForms。下面的代碼我有如下：Centering Bootstrap/FlaskWTForms（Jinja）
HTML
{% block content %}
<body>
<div class="container center_div" align=middle>
<h2>Indie/Alternative Artist Recommendation</h2>
<p>Enter 5 artists below and we will provide similar artists you may like</p>
<br/>
<form method="Post" action="/results">
<div class="col-xs-4" align=middle>
{{ form.artist1.label(class="col-md-6 col-sm-12") }}
{{ form.artist1(class="form-control") }}
{{ form.artist2.label(class="col-lg-6 col-md-6 col-sm-12") }}
{{ form.artist2(class="form-control") }}
{{ form.artist3.label(class="col-lg-6 col-md-6 col-sm-12") }}
{{ form.artist3(class="form-control") }}
{{ form.artist4.label(class="col-lg-6 col-md-6 col-sm-12") }}
{{ form.artist4(class="form-control") }}
{{ form.artist5.label(class="col-lg-6 col-md-6 col-sm-12") }}
{{ form.artist5(class="form-control") }}
<p><input type=submit value=Go type="button" class="btn btn-default"></p>
</div>
</form>
</div>
{% block scripts %}
<script src="{{url_for('.static', filename='js/getArtists.js')}}"></script>
{{super()}}
{% endblock %}
和CSS我（在我bootstrap.css文件）的位：
.center_div{
margin: 0 auto;
width:90%;
text-align: middle;
}