#1 셋업 import React,{Component,Fragment} from "react"; import "./App.css"; class App extends Component{ render(){ return ( Hello; Hello; ); } } export default App; class명 2개 사용 안좋음 .button{ border-radius:50px; padding:5px; min-width:120px; color:white; font-weight:600; -webkit-appearance:none; cursor:pointer; } .button:active, .button:focus{ outline:none; } .button--success{ background-color:#2ec..