Используя Reac.memo
, чтобы обернуть мой функциональный компонент, и он может работать гладко, но eslint всегда напоминал мне две ошибки:
error Component definition is missing display name react/display-name
error 'time' is missing in props validation react/prop-types
Вот мой код:
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> */}
</>
);
});
Весь мой код:
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;