Advertisements I am unable to figure out how to iterate through the rendered List in React Js and access the key and value properties. Code snippet const Cards = ({arr}) => { return ( <ul className=’output’> {arr.map(e => { return <li key={e.id} className="card" > {e.value} <FaTimes color=’red’ style={{cursor: ‘pointer’}} onClick={e => console.log(e.value)}/> </li> })} </ul>… Read More How to iterate through list elements in react?
Advertisements I’ve just recently started to learn about what a macro is in the context of Lisp. My understanding is that, basically, the code is executed in two passes. On the first pass, the interpreter identifies calls to macros and replaces them with their return value. On the second, it executes the code normally. This… Read More Are custom hooks in React (like) macros?
Advertisements I have a useFetchPokemon hook that includes the following code: import { useState, useEffect } from "react"; export const useFetchPokemon = () => { const initialUrl = "https://pokeapi.co/api/v2/pokemon" const [pokemon, setPokemon] = useState([]) as any; const [nextUrl, setNextUrl] = useState(null) const [previousUrl, setPreviousUrl] = useState(null) const getPokemonDetails = async (listOfPokemon: any) => { const… Read More React state not updating with new data being fetched?
Advertisements I’m not sure how to tackle this problem. I have two or more buttons and whenever I click on a button, I want my text to change. Any ideas? import "./styles.css"; function App() { return ( <div className="App"> <h1>Change me!</h1> <button>Button 1</button> <button>Button 2</button> <button>Button 3</button> </div> ); } >Solution : This is a… Read More Change headline text when clicking on multiple buttons in React
Advertisements I’m developing an React app that have different user types. Each user has specific items on it’s menu. An item may be a link or a submenu. I want to render buttons for link items and collapses (of react-bootstrap) for submenus. But, to have the Collapse to work properly, I need to add a… Read More Add state as property on each item of an array of object
Advertisements Given this minimal example: import React, { useState } from ‘react’; function Component({ num }) { const [lorem, setLorem] = useState(‘lorem’); return ( <div> {num}: {lorem} </div> ); } function AnotherComponent({ render = Component }) { const [isOpen, setIsOpen] = useState(false); return ( <div> <button type="button" onClick={() => setIsOpen(true)}> Open </button> {isOpen ? render({… Read More React – Using render props with conditional components causes hooks error
Advertisements I am trying to make an app where you can click on an anchor point on a page, then click on an image in a side div and change the anchor point’s image src to be that of the new image clicked. I have an array of image SRC’s that I map through, however… Read More Why Isn't may Array of image SRC's are not updating with UseState
Advertisements I have used hooks in index.js to fetch data from an API. The data is displayed in rows and every row has a button with onClick={() => EditExercise(item.idexercise)}. EditExercise is a function in a .jsx file that receives the id and fetches a single item from the same API. function EditExercise(id){ const [error, setError]… Read More How can I fetch data from API using an ID passed to a function when clicking a button
Advertisements I’m trying to show a table in my react component, but i don’t know how to use useEffect and useState to render table in first render. My component js: import React, { useEffect, useState } from ‘react’ const Projects = () => { const [tableData, setTableData] = React.useState() useEffect(() => { fetch(‘https://script.google.com/macros/s/AKfycbzuKuSOUfd9IOsQobix0PnIRv28IB3uTx5KdpVoVeNe04g7QzXQeeCEbsHBxE5CYdEV8A/exec’) //получение информации… Read More How to rerender component, using useEffect and useState?
Advertisements How can I make regex pattern allowing following characters, numbers, white space, double quotes, ?, !, commas, hyphen, dots, @ and & <textarea id="comments" type="textarea" placeholder=’comments’ {…register("comments", { required: true, minLength: { value: 5, message: "Minimum length of 5 letters" }, pattern: { value: /^[a-z0-9]+$/i, message: "Supports characters, numbers, white space, "", ?, !,… Read More How can I make regex pattern with characters, numbers, white space, double quotes, ?, !, commas, hyphen, dots, @ and &