JSFiddle - React, Tailwind, and code Playground

HTML

<div class="signLog">

  <h2 class="boxTitle">Sign Up</h2>
  
  <form class="signupForm">
      <div class="placeholding-input">
        <input type="text" name="username" class="field" />
        <span class="placeholder">Username</span>
      </div>
      
      <div class="placeholding-input">
        <input type="email" name="email" class="field" />
        <span class="placeholder">Email</span>
      </div>
      
      <div class="placeholding-input">
        <input type="password" name="password" class="field" />
        <span class="placeholder">Password</span>
      </div>
      
      <input type="submit" value="Create Account" />
      <div class="clear"></div>
  </form>
  
</div>

CSS

body {
    font-family: 'Lucida Grande', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    padding: 100px;
    font-size: 16px;
    color: #3b3b3b;
    background: #6BABFF;
}

.signLog {
    position: relative;
    background: #fff;
    margin: 0 auto;
    width: 300px;
    /* border-radius */
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;
    border-radius: 5px;
    /* box-shadow */
    -webkit-box-shadow: rgba(0,0,0,0.2) 0px 1px 3px;
    -moz-box-shadow: rgba(0,0,0,0.2) 0px 1px 3px;
    box-shadow: rgba(0,0,0,0.2) 0px 1px 3px;
    background: #ffffff;
    background: -moz-linear-gradient(top, #ffffff 0%, #dddddd 100%);
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#ffffff), color-stop(100%,#dddddd));
    background: -webkit-linear-gradient(top, #ffffff 0%,#dddddd 100%);
    background: -o-linear-gradient(top, #ffffff 0%,#dddddd 100%);
    background: -ms-linear-gradient(top, #ffffff 0%,#dddddd 100%);
    background: linear-gradient(top, #ffffff 0%,#dddddd 100%);
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='#dddddd',GradientType=0 );
}

.signupForm {
    padding: 16px;
}

.placeholding-input {
    position: relative;
    font-size: 15px;
    font-weight: normal;
}

.placeholder {
    position: absolute;
    top: 10px;
    left: 14px;
    color: #aaaaaa;
    -moz-transition: all .08s ease;
    -webkit-transition: all .08s ease;
    -o-transition: all .08s ease;
}

.faded {
    color: #cccccc;
}

.field {
    margin: 0 0 8px 0;
    padding: 8px 12px;
    width: 242px;
    color: #777777;
    font-size: 15px;
    font-weight: normal;
    border: 1px solid #ccc;
    border-radius: 4px;
    outline: none;
    box-shadow: 0 1px 0 #eeeeee inset, 0 1px 0 #ffffff;
    display: block;
    background: #ffffff;
    -moz-transition: all .08s ease;
    -webkit-transition: all .08s ease;
    -o-transition: all .08s ease;
}

.field:focus {
    border: 1px solid #6BABFF;
    outline:...

JavaScript

$('.field').each(function () {
    
    if ($(this).val() != '') {
        $(this).parent('.placeholding-input').children('.placeholder').hide();
    }
    
});

$('.placeholder').click(function() {
    
    var thisField = $(this).parent('.placeholding-input').children('.field');
    
    $(thisField ).trigger('focus');
    
});

$('.placeholding-input input').bind("propertychange keydown input paste", function(event){
    
    $(this).parent('.placeholding-input').children('.placeholder').hide();
    
});

$('.placeholding-input input').focus(function() {
    
    $(this).parent('.placeholding-input').children('.placeholder').addClass('faded');
    
});

$('.placeholding-input input').blur(function() {
    
    if($(this).val() == ''){
        $(this).parent('.placeholding-input').children('.placeholder').show().removeClass('faded');
    } else {
        
    }
    
});