什么是状态提升，子父组件如何通信？

普通子父组件状态

import React from "react";

export default function Father() {
  return (
    <div>
      <Child1 name="孩子1" />
      <Child2 name="孩子2" />
    </div>
  );
}

function Child1({ name }) {
  return <div>Child1：{name}</div>;
}
function Child2({ name }) {
  return <div>Child2：{name}</div>;
}

提升后的状态,在子组件1中更改子组件2，或者子组件2更改子组件1

import React, { useState } from "react";

export default function Father() {
  const [child1Name, setChild1Name] = useState("");
  const [child2Name, setChild2Name] = useState("");

  const handleChange = (val) => {
    setChild1Name(val);
  };

  return (
    <div>
      <Child1 name={child1Name} setChild2Name={setChild2Name} />
      <Child2 name={child2Name} onChange={handleChange} />
    </div>
  );
}

function Child1({ name, setChild2Name }) {
  return (
    <div>
      <div>组件Child1的name是：{name}</div>
      <div>
        子组件2的名字是
        <input onChange={(e) => setChild2Name(e.target.value)} />
      </div>
    </div>
  );
}
function Child2({ name, onChange }) {
  const handleChange = (e) => {
    onChange?.(e.target.value);
  };
  return (
    <div>
      <div>组件Child2的name是：{name}</div>
      <div>
        子组件1的名字是是
        <input onChange={handleChange} />
      </div>
    </div>
  );
}