how to use useref hook in react

useref react

import React, {useRef, useEffect} from "react";

export default function (props) {
  // Initialized a hook to hold the reference to the title div.
  const titleRef = useRef();
  
  useEffect(function () {
    setTimeout(() => {
      titleRef.current.textContent = "Updated Text"
    }, 2000); // Update the content of the element after 2seconds 
  }, []);
  
  return <div className="container">
    {/** The reference to the element happens here **/ }
    <div className="title" ref={titleRef}>Original title</div>
  </div>
}

Posted by: Guest on February-16-2021

Source

import React, { useRef } from 'react'; function TextInputWithFocusButton() { const inputEl = useRef(null); const onButtonClick = () => { // `current` points to the mounted text input element inputEl.current.focus(); }; return ( <> <input ref={inputEl} type="text" /> <button onClick={onButtonClick}>Focus the input</button> </> ); }

import React, { useEffect, useRef } from 'react'; const fooComponent = props => { const inputBtnRef = useRef(null); useEffect(() => { //Add the ref action here inputBtnRef.current.focus(); }); return ( <div> <input type="text" ref={inputBtnRef} /> </div> ); }

const refContainer = useRef(initialValue); //useRef returns a mutable ref object whose .current property is initialized to the passed argument (initialValue). //The returned object will persist for the full lifetime of the component.

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