JSFiddle - React, Tailwind, and code Playground

HTML

<div class="file">
  <label for="file-input">Pick a file</label>
  <input type="file" id="file-input">
</div>

CSS

.file {
  position: relative;
  height: 30px;
  width: 100px;
}

.file > input[type="file"] {
  position: absoulte;
  opacity: 0;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0
}

.file > label {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  bottom: 0;
  background-color: #666;
  color: #fff;
  border-radius: 5px;
  line-height: 30px;
  text-align: center;
  cursor: pointer
}