/Javascript/React/What does useref do react

What does useref do 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

How to use useref hook in react

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>
    </>
  );
}

Source: reactjs.org

Similar codes

2 votes325 views1 answer
Redux React redux
Javascript React
25 votes247 views4 answers
React context
Javascript React
144 votes550 views6 answers
How to install react js
Javascript React
0 vote342 views1 answer
ExoPlayer with auto linking react native
Javascript React
0 vote366 views1 answer
React native make safe view in mobile
Javascript React
0 vote327 views1 answer
React image source showing object module
Javascript React
0 vote335 views1 answer
Debug react routes
Javascript React
0 vote338 views1 answer
Onclick react history map
Javascript React
0 vote381 views1 answer
React grid generator
Javascript React
0 vote315 views1 answer
React $ r component instance console
Javascript React