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React useRef Hook

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naly moslih answered on June 6, 2020 Popularity 10/10 Helpfulness 2/10

answer React useRef Hook

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React useRef Hook

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//Use useRef to track application renders
import { useState, useEffect, useRef } from "react";
import ReactDOM from "react-dom/client";

function App() {
  const [inputValue, setInputValue] = useState("");
  const count = useRef(0);

  useEffect(() => {
    count.current = count.current + 1;
  });

  return (
    <>
      <input
        type="text"
        value={inputValue}
        onChange={(e) => setInputValue(e.target.value)}
      />
      <h1>Render Count: {count.current}</h1>
    </>
  );
}

const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(<App />);

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: hook javascript use-ref

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Contributed on May 24 2022

naly moslih

0 Answers Avg Quality 2/10

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useRef() in react

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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>
    </>
  );
}

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: reactjs.org

Tags: javascript j

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Contributed on Jun 06 2020

Salo Hopeless

0 Answers Avg Quality 2/10

useref react

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import React, { useState, useRef, useEffect } from 'react'
import { render } from 'react-dom'

function App() {
  const intervalRef = useRef()
  const [count, setCount] = useState(0)

  useEffect(() => {
    intervalRef.current = setInterval(() => setCount(count => count + 1), 1000)

    return () => {
      clearInterval(intervalRef.current)
    }
  }, [])

  return (
    <>
      <div style={{ fontSize: 120 }}>{count}</div>
      <button
        onClick={() => {
          clearInterval(intervalRef.current)
        }}
      >
        Stop
      </button>
    </>
  )
}

render(<App />, document.querySelector('#app'))

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: www.react.express

Tags: hook

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Contributed on Nov 08 2022

Mehedi Islam Ripon

0 Answers Avg Quality 2/10

useref in react

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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>;
}

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: dmitripavlutin.com

Tags: javascript j

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Contributed on Aug 02 2021

Friendly Fly

0 Answers Avg Quality 2/10

React useRef Hook

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// The useRef Hook allows you to persist values between renders.
// This hook allows you to create a reference to a DOM element.
// Which directly communicates with the "Real DOM" and no the "Virtual DOM"
// Used to store a mutable value that does not cause a re-render when updated.
// It has access to all DOM Manipulate and HTML element methods.

import { useRef } from "react";

function App() {
  // This creates a ref object that holds a reference to the input element
  // Because it is referenced in the input field below
  const inputElement = useRef(); 

  const focusInput = () => {
  	// On button click below set the focus on the input element
    // Note on why we must use ".current" to access a "useRef" below
    inputElement.current.focus(); // To focus on the input file
    inputElement.current.value; // To get the value from the input
  };

  return (
    <>
      <input type="text" ref={inputElement} />
      <button onClick={focusInput}>Focus Input</button>
    </>
  );
}

/*	Explanation of ".current"
		The .current property exists in useRef hook because refs themselves don't 
        directly store the DOM element or value. They act as a container that holds
        a reference to the actual element or value.
*/


// With love @kouqhar

Popularity 8/10 Helpfulness 2/10 Language javascript

Source: github.com

Tags: hook javascript javas

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Contributed on Apr 17 2024

kouqhar

0 Answers Avg Quality 2/10

useRef in reactjs

Comment

import { useRef } from 'react';

export default function Counter() {
  let ref = useRef(0);

  function handleClick() {
    ref.current = ref.current + 1;
    alert('You clicked ' + ref.current + ' times!');
  }

  return (
    <button onClick={handleClick}>
      Click me!
    </button>
  );
}

Popularity 9/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Jun 13 2023

Imran Khan

0 Answers Avg Quality 2/10

React useRef Hook

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