UseRef() in react

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>
    </>
  );
}

Source: reactjs.org

What does useref do react

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.

Source: reactjs.org

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>
    </>
  );
}

Source: reactjs.org

Useref

  const inputEl = useRef(null);

Useref in react

import { useRef } from 'react';

function LogButtonClicks() {
  const countRef = useRef(0);  
  const handle = () => {
    countRef.current++;    console.log(`Clicked ${countRef.current} times`);
  };

  console.log('I rendered!');

  return <button onClick={handle}>Click me</button>;
}

Source: dmitripavlutin.com

Similar codes

0 vote233 views3 answers
React date format
Javascript React
0 vote230 views1 answer
Set meterial icon color change onClick react
Javascript React
0 vote276 views1 answer
React js input autocomplete off
Javascript React
4 votes241 views1 answer
Use of useNavigate from 'react-router-dom'
Javascript React
0 vote238 views1 answer
Add clickable link to image in react native
Javascript React
3 votes210 views3 answers
Update create react app
Javascript React
2 votes231 views1 answer
React function being called every minute
Javascript React
16 votes232 views2 answers
Where to put background images in react app
Javascript React
0 vote256 views1 answer
React-select-search useSelect hook
Javascript React
2 votes257 views1 answer
React strict mode
Javascript React