<div class="container"></div>

const { createContext, useContext, useState, useMemo } = React;

type ValueType = { [key: string]: number | undefined };

const context = createContext<ValueType>(undefined as never);

const Component = ({ name }: { name: string }) => {
  const value = useContext(context);
  console.log(name);
  return (
    <div>
      {name}:{value[name]}
    </div>
  );
};
const Component2 = ({ name }: { name: string }) => {
  console.log(name);
  return <div>{name}</div>;
};
const Page = ({children}) => {
  const [value, setValue] = useState<ValueType>({});
  console.log("Main");
  return (
    <>
      <button onClick={() => setValue((v) => ({ ...v, A: (v["A"] || 0) + 1 }))}>
        A
      </button>
      <button onClick={() => setValue((v) => ({ ...v, B: (v["B"] || 0) + 1 }))}>
        B
      </button>
      <button onClick={() => setValue((v) => ({ ...v, C: (v["C"] || 0) + 1 }))}>
        C
      </button>
      <context.Provider value={value}>{children}</context.Provider>
    </>
  );
};

ReactDOM.render(
  <Page>
    <Component name="A" />
    <Component name="B" />
    <Component name="C" />
    <Component2 name="D" />
  </Page>,
  document.querySelector(".container")
);