bulma control classname code example
Example: submit button bulma
<div class="field is-grouped is-grouped-centered">
<p class="control">
<a class="button is-primary">
Submit
</a>
</p>
</div>
<div class="field is-grouped is-grouped-centered">
<p class="control">
<a class="button is-primary">
Submit
</a>
</p>
</div>