JSFiddle - React, Tailwind, and code Playground

by ppgab

HTML

<script src="//code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<link rel="stylesheet" href="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<div class="container m-3">
  <div class="row">
    <div class="col-3">
      <select class="my-custom-forms">
        <option>Option</option>
      </select>
    </div>
    <div class="col-3">
      <select class="my-custom-forms">
        <option>Option</option>
      </select>
    </div>
    <div class="col-6">
      <input placeholder="text" class="my-custom-forms">
    </div>
  </div>
</div>

CSS

@import url(https://fonts.googleapis.com/css?family=Open+Sans);
.my-custom-forms {
    font-family: 'Open Sans',serif;
}
select.my-custom-forms, input.my-custom-forms{
    border-top: none;
    border-left: none;
    border-right: none;
    border-radius: 0;
    border-bottom: 2px solid lightblue;
    padding: .25rem .1rem .25rem .1rem;
    overflow: auto;
    width: 100%;
    background-color: transparent;
    transition: border .5s ease;
}