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 vote100 views1 answer
React index.js file
Javascript React
0 vote170 views1 answer
Toggle function react js
Javascript React
0 vote109 views1 answer
React native listview date separator site:stackoverflow.com
Javascript React
5 votes65 views1 answer
Add icon material ui
Javascript React
0 vote97 views1 answer
Render first index active tabs in reactjs
Javascript React
0 vote104 views1 answer
Calculations inside a render function react js
Javascript React
12 votes109 views3 answers
Font weight react native
Javascript React
0 vote101 views1 answer
React native delay input
Javascript React
0 vote123 views1 answer
Image and video lightbox react
Javascript React
0 vote105 views1 answer
Log errors react
Javascript React