嗨，有些人可以帮助我处理这个 ReactJS 代码 [关闭]

Question

我没有返回任何东西，也没有收到任何错误，解决办法是什么？

import React from 'react'

function Array() {
    function myConcat() {
    const Villain = ["Harley Quinn", "Brainiac", "Deathstroke"];
    const Hero = ["Superman", "Batman", "Black Canary"];
    const VillainsAndHeroes = Villain.concat(Hero);
        return VillainsAndHeroes;
}
    return (
        <div>
            { myConcat() }
        </div>
    )
}

export default Array

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>

Answer 1

我输入了您的代码in a sandbox，它似乎可以工作。比较你的代码。

import React from "react";
import "./styles.css";

function Array() {
  function myConcat() {
    const Villain = ["Harley Quinn", "Brainiac", "Deathstroke"];
    const Hero = ["Superman", "Batman", "Black Canary"];
    const VillainsAndHeroes = Villain.concat(Hero);
    return VillainsAndHeroes;
  }
  return <div>{myConcat()}</div>;
}

export default function App() {
  return (
    <div className="App">
      <h1>Hello CodeSandbox</h1>
      <h2>Start editing to see some magic happen!</h2>
      <Array />
    </div>
  );
}