React パフォーマンス最適化のヒント: フロントエンド アプリケーションの応答速度を向上させる方法

import React, { PureComponent } from 'react';

class MyComponent extends PureComponent {
  // 组件实现
}

import React, { useMemo } from 'react';

const MyComponent = ({ data }) => {
  // 组件实现
};

export default React.memo(MyComponent);

class MyComponent extends React.Component {
  shouldComponentUpdate(nextProps, nextState) {
    // 判断是否需要重新渲染组件
  }

  render() {
    // 组件实现
  }
}

import React, { useMemo } from 'react';

const MyComponent = ({ data }) => {
  // 判断是否需要重新渲染组件
  const shouldRender = useMemo(() => {
    // 判断逻辑
  }, [data]);

  if (!shouldRender) return null;

  // 组件实现
};

export default MyComponent;

import React from 'react';
import { List } from 'react-virtualized';

const MyComponent = ({ data }) => {
  const rowRenderer = ({ index, key, style }) => {
    const item = data[index];

    return (
      <div key={key} style={style}>
        {item}
      </div>
    );
  };

  return (
    <List
      height={400}
      width={300}
      rowCount={data.length}
      rowHeight={30}
      rowRenderer={rowRenderer}
    />
  );
};

export default MyComponent;

import React from 'react';
import memoizeOne from 'memoize-one';

const MyComponent = ({ data }) => {
  const transformedData = memoizeOne((data) => {
    // 对data进行转换的逻辑
    return transformedData;
  });

  const transformedData = transformedData(data);

  return (
    <div>
      {transformedData.map((item) => (
        <Item key={item.id} item={item} />
      ))}
    </div>
  );
};

import React, { lazy, Suspense } from 'react';

const MyComponent = lazy(() => import('./MyComponent'));

const App = () => {
  return (
    <Suspense fallback={<div>Loading...</div>}>
      <MyComponent />
    </Suspense>
  );
};