Program ＞ Bootstrap

よく使うBootstrapの書き方まとめ

Alert †

https://getbootstrap.com/docs/3.4/components/#alerts

<div class="alert alert-success" role="alert">alert alert-success</div>
<div class="alert alert-info" role="alert">alert alert-info</div>
<div class="alert alert-warning" role="alert">alert alert-warning</div>
<div class="alert alert-danger" role="alert">alert alert-danger</div>