react hooks useref code example

Example 1: react usestate

import React, { useState } from 'react';

function Example() {
  // Declare a new state variable, which we'll call "count"
  const [count, setCount] = useState(0);

  return (
    <div>
      <p>You clicked {count} times</p>
      <button onClick={() => setCount(count + 1)}>
        Click me
      </button>
    </div>
  );
}

Example 2: useRef

/*
	A common use case is to access a child imperatively: 
*/

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>
    </>
  );
}

Example 3: 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>
}

Example 4: useref in functional component

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>
    </>
  );
}

Example 5: react useref in useeffect

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>
    );
}

Example 6: useRef() in 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>
    </>
  );
}