Inside of my useEffect, I have a props dependency (setIsValid). When I add this dependency to the useEffect, it lands in an infinite loop.  Parent when Calling Child Component:  const setIsValid = (bool) => {   const tmpStateCopy = Object.assign({...

With regular React it's possible to have something like this:  class NoteEditor extends React.PureComponent {      constructor() {         super();          this.state = {             noteId: 123,         };     }      componentWillUnmount() {...

I have two inputs whose values reflect the state of a counter.  The first input sets the state immediately as its value changes. This input can represent other parts of the application changing state.  The second input part of a component I made name...

import React, {useState, useEffect} from 'react'; import socketIO from 'socket.io-client'; import Container from 'react-bootstrap/Container';  function Sock() {    const [textData, setTextData] = useState([]);     useEffect(()...

I have a simple React component and when I inspect the console what I logged appears 3 times.   The Load APP log comes from my main App.js component and Load New from the component rendered by the Navigation in App.js : FasList.js.  Why do I see 3 lo...

I don't understand why React not update my object. In another component through the dispatch I update the state. In this (in code below) code in mapStateToProps categories are changing (console log show one more category). But component not reren...

I am trying to do some kind of online shop for myself and I got a problem. I want to render my shopping cart size in the NavBar component (which is on every page).  I created a Cart Items service where I put all my added items, and it also has functi...

Compare the following two components:  Child.js  import React, { useEffect } from "react";  function Child({ count, setCount }) { // Note: Has parameter   useEffect(() => {     setInterval(() => {       setCount(prevCount => prevCoun...

Currently, I have a 3 rows in a table. Each row has two column: file name and a button   file name is just a dummy link. button will hide show a menu.   My requirements are following:   Click a button, it will toggle the menu. i.e. if prev it is clos...

I am creating a simple chance dice game using jsx functional components, however when I click a button that creates a roll it displays the post state. Here is my code for the component (reduced un-necessary code), fairly new to coding so excuse if it...