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Javascript 2021-10-01 15:13:08
what does useref do react
/* 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(); ... Add solution -
Javascript 2021-09-25 11:00:03
usePrevious
import { useState, useEffect, useRef } from "react"; // Usage function App() { // State value and setter for our example const [count, setCount] = useState(0); // Get the previous value (was passed into hook on last render) const prevC... Add solution -
Javascript 2021-09-21 14:13:03
useref material ui
// Using the useRef() hook. Only possible when you're using a function component. const App = () => { const textRef = useRef(); const showRefContent = () => { console.log(textRef.current.value); }; return ( <div className="Ap... Add solution -
Javascript 2021-09-16 00:31:02
react useeffect not on first render
//This is a way to build this effect as a custom hook import React, { useEffect, useRef } from 'react'; const useDidMountEffect = (func, deps) => { const didMount = useRef(false); useEffect(() => { if (didMount.current) func(); ... Add solution -
Javascript 2021-09-09 18:08:02
search bar idle time react js
How about a custom hook? import {useEffect, useRef, useState} from "react"; export default function useSearchInputState(searchHandler) { // to prevent calling the handler on component mount const didMountRef = useRef(false); const [s... Add solution -
Javascript 2021-09-06 12:04:02
stop playing music when page is closed react
import React, { useRef, useEffect } from 'react'; import waves from '../audio/waves.mp3'; const RockyCoast = (props) => { // the audio variable needs to be stored in a ref in order to access it across renders let audio = useRef(); // s... Add solution