React eslint报错：组件定义缺少显示名称

Question

使用Reac.memo包裹我的功能组件，可以流畅运行，但是eslint总是提示我两个错误：

error    Component definition is missing display name  react/display-name

error    'time' is missing in props validation         react/prop-types

这是我的代码：

type Data = {
  time: number;
};
const Child: React.FC<Data> = React.memo(({ time }) => {
  console.log('child render...');
  const newTime: string = useMemo(() => {
    return changeTime(time);
  }, [time]);

  return (
    <>
      <p>Time is {newTime}</p>
      {/* <p>Random is: {children}</p> */}
    </>
  );
});

我的整个代码：

import React, { useState, useMemo } from 'react';

const Father = () => {
  const [time, setTime] = useState(0);
  const [random, setRandom] = useState(0);

  return (
    <>
      <button type="button" onClick={() => setTime(new Date().getTime())}>
        getCurrTime
      </button>
      <button type="button" onClick={() => setRandom(Math.random())}>
        getCurrRandom
      </button>
      <Child time={time} />
    </>
  );
};

function changeTime(time: number): string {
  console.log('changeTime excuted...');
  return new Date(time).toISOString();
}

type Data = {
  time: number;
};
const Child: React.FC<Data> = React.memo(({ time }) => {
  console.log('child render...');
  const newTime: string = useMemo(() => {
    return changeTime(time);
  }, [time]);

  return (
    <>
      <p>Time is {newTime}</p>
      {/* <p>Random is: {children}</p> */}
    </>
  );
});

export default Father;

Answer 1

这是因为你有 eslint 配置，需要你添加 displayName 和 propTypes

做类似的事情

const Child: React.FC<Data> = React.memo(({ time }) => {
  console.log('child render...');
  const newTime: string = useMemo(() => {
    return changeTime(time);
  }, [time]);

  return (
    <>
      <p>Time is {newTime}</p>
      {/* <p>Random is: {children}</p> */}
    </>
  );
});

Child.propTypes = {
  time: PropTypes.isRequired
}

Child.displayName = 'Child';

Answer 2

如果您正在使用 React 和 TypeScript，您可以关闭 react/prop-types 规则。

这是因为 TypeScript 接口/道具足以替代 React 的道具类型。