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 vote256 views1 answer
Which algorithm React is used to compare dom?
Javascript React
0 vote201 views1 answer
Write button hover in react
Javascript React
0 vote257 views2 answers
Loop through array react native
Javascript React
-1 vote212 views1 answer
React grid
Javascript React
0 vote209 views2 answers
React date picker disable past dates
Javascript React
6 votes221 views2 answers
How do I conditionally add attributes to React components?
Javascript React
0 vote224 views1 answer
Loop number in react
Javascript React
2 votes217 views2 answers
Vscode react extensions
Javascript React
0 vote202 views1 answer
React throttle render
Javascript React
1 vote211 views1 answer
What is react easy emoji
Javascript React