React 基础知识~样式组件/ inline_style

import { useState } from "react";const Example = () =&gt; {  const [isSelected, setIsSelected] = useState(false);  const clickHandler = () =&gt; setIsSelected((prev) =&gt; !prev);  const style = {    width: 120,    height: 60,    display: "block",    fontWeight: "bold",    "border-radius": 9999,    cursor: "pointer",    border: "none",    margin: "auto",    background: isSelected ? "pink" : "",  };  return (          <button style="{style}" onclick="{clickHandler}">        Button      </button>      <div style="{{" textalign:>{isSelected &amp;&amp; "Clicked!"}</div>    &gt;  );};export default Example;