JSFiddle - React, Tailwind, and code Playground

by Stéphane LEGRAND

HTML

<span class="input input--hoshi">
    <input class="input__field input__field--hoshi" type="password" name="requete" maxlength="255" id="input-4" placeholder="votre mot de passe" size="50">
    <label class="input__label input__label--hoshi input__label--hoshi-color-1" for="input-4">Votre mot de passe</label>
</span>

CSS

.clearfix:before, .clearfix:after { content: ''; display: table; }
.clearfix:after { clear: both; }
.input {
  position: relative;
  z-index: 1;
  display: inline-block;
  margin: 1em;
  max-width: 350px;
  width: calc(100% - 2em);
  vertical-align: top;
}
.input__field {
  position: relative;
  display: block;
  float: right;
  padding: 0.8em;
  width: 60%;
  border: none;
  border-radius: 0;
  background: #f0f0f0;
  color: #aaa;
  -webkit-appearance: none; /* for box shadows to show on iOS */
}
.input__field:focus {
  outline: none;
}
.input__label {
  display: inline-block;
  float: right;
  padding: 0 1em;
  width: 40%;
  color: #6a7989;
  font-weight: bold;
  font-size: 70.25%;
  -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
.input__label-content {
  position: relative;
  display: block;
  padding: 1.6em 0;
  width: 100%;
}
.graphic {
  position: absolute;
  top: 0;
  left: 0;
  fill: none;
}
.icon {
  color: #ddd;
  font-size: 150%;
}
/* Individual styles */
/* Hoshi */
.input--hoshi {
  overflow: hidden;
}
.input__field--hoshi {
  margin-top: 1em;
  padding: 0.85em 0.15em;
  width: 100%;
  background: transparent;
  color: #595F6E;
}
.input__label--hoshi {
  position: absolute;
  bottom: 0;
  left: 0;
  padding: 0 0.25em;
  width: 100%;
  height: calc(100% - 1em);
  text-align: left;
  pointer-events: none;
}
.input__label-content--hoshi {
  position: absolute;
}
.input__label--hoshi::before,
.input__label--hoshi::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: calc(100% - 10px);
  border-bottom: 1px solid #B9C1CA;
}
.input__label--hoshi::after {
  margin-top: 2px;
  border-bottom: 4px solid red;
  -webkit-transform: translate3d(-100%, 0, 0);
  transform: translate3d(-100%, 0, 0);
  -webkit-transition: -webkit-transform...