为什么我收到“元素类型无效：需要一个字符串（对于内置组件）或一个类/函数（对于复合组件）...”？

Question

Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports. 当我尝试从 NextJs 应用程序中的 React-Icons 导入图标时遇到了这个问题。

请参阅下面的我的代码。

import React from "react";

import MdPlayCircleOutline from "react-icons";

const Podcast = props => {
  return (
    <div className="podcast">
      <div className="podcastName">
        <h4>{props.title}</h4>
      </div>

      <MdPlayCircleOutline />
    </div>
  );
};

export default Podcast;

为什么这个？

Answer 1

每个图标集都有自己的文件夹。对于 Material Design 图标，它是'./md'. 所以，导入应该是：

import { MdPlayCircleOutline } from 'react-icons/md' 

请参阅：http : //react-icons.github.io/react-icons/#usage