JSFiddle - React, Tailwind, and code Playground

by ZooeyLai

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/autosize.js/3.0.20/autosize.min.js"></script>
    <div class="wrap">
        <div class="container">
            <div class="form">
                <div class="form-group">
                    <label for="name" class="form-label">暱稱</label>
                    <input type="text" id="name" class="form-input" placeholder="請輸入暱稱" autocomplete="on">
                </div>
                <div class="form-group">
                    <label for="message" class="form-label">留言</label>
                    <textarea class="form-input" id="message" placeholder="請輸入訊息"></textarea>
                </div>
                <a href="#" class="btn btn-primary">送出</a>
            </div>            
        </div>
    </div>

CSS

:root {
  --primary: #4f46e5;
  --gray: #e2e8f0;
  --white: #fff;
}

* {
  box-sizing: border-box;
  font-size: 1rem;
}    
    .container{
        width: 400px;
        margin: 0 auto;
    }
    a{
        text-decoration: none;
    }
.form-group {
  margin-bottom: 1rem;
  display: flex;
  flex-flow: column;
}

.form-label {
  font-size: 0.75rem;
  margin-bottom: 0.25rem;
}

.form-input {
  border: 1px solid #94a3b8;
  padding: 0.5rem 1rem;
  border-radius: 0.25rem;
}

.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0px 0px 0px 3px rgba(79, 70, 229, 0.4);
  outline: none;
}
.btn {
  padding: 0.5rem 1rem;
  border: 2px solid transparent;
  border-radius: 0.25rem;
  background-color: var(--gray);
  color: #475569;
  cursor: pointer;
  display: block;
  text-align: center;
}
.btn:hover {
  transform: scale(1.02);
  transition: all 0.3s;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--white);
}

JavaScript

autosize(document.querySelector('textarea'));