JSFiddle - React, Tailwind, and code Playground

HTML

<style>
body{
    margin:0;
    padding:0;

}
.div1{
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    margin: auto;
    width: 500px;
    height: 300px;
    overflow: auto;
    background: #3CC;
    position: absolute;
}
</style>

<div class="container">
    <div class="div1">
        <p>世界，你好！</p>
    </div>
</div>