小编nun*_*ira的帖子

单击按钮时如何消除按钮周围出现的光晕？

<div class="container">
  <div class="row">
      <div class="col-md-12 mt-5">
          <button type="button" class="btn btn-primary">Primary</button>
      </div>
  </div>
</div>

https://www.bootply.com/vHRldZZt8u