useRef创建的对象存在react整个生命周期当中

import React,{useRef, useState} from 'react'

/**
 * 
 * @returns useRef创建的对象存在于整个生命周期中，每次返回的都是都一个对象
 */
export default function Test() {
  const [count,setCount] = useState(0);
  const uRef = useRef(0);
  const reactRef = React.createRef(0);
  if(!uRef.current){
    uRef.current = count;
  }
  if(!reactRef.current){
    reactRef.current = count;
  }
  console.log(uRef,reactRef);
  return (
    <div>
      <p>createRef:{reactRef?.current}</p>
      <p>useRef:{uRef?.current}</p>
      <strong>createRef</strong>
      <strong>useRef</strong>
      <button onClick={()=>{setCount(prev=>++prev)}}>count++</button>
    </div>
  )
}