Advertisements I’m trying to render a HTML block after a state variable succesfully setted. For this purpose, in below, I defined my state variables and my functions to set them a value. const formService:FormService=new FormService(); const [appointmentDate, setAppointmentDate] = useState<AppointmentDate>(); const [formattedDate, setFormattedDate ]=useState<string>() const [formattedTime, setFormattedTime ]=useState<string>() const [formattedTime20MinutesBefore, setFormattedTime20MinutesBefore] = useState<string>() useEffect(()=>{ init();… Read More How to render the HTML after a stateVariable set in React with TypeScript

Advertisements I’m fairly new to React, so there is probably just an easier way to do this. But I have a List of items const NOTES = [ { id: 0, val: "C" }, { id: 1, val: "C#" }, { id: 2, val: "D" }, { id: 3, val: "D#" }, { id: 4,… Read More How to map a List of items 'n' times, but loop back to the beginning each time

Advertisements I cannot get the total because of the type of calculateTotal function import CartItem from "./CartItem" import {CartItemType} from ‘../App’ import {Typography,Stack} from ‘@mui/material’; type Props ={ cartItem:CartItemType[]; addToCart:(clickedItem: CartItemType)=>void; removeFromCart:(id:number) => void; } const Cart: React.FC<Props> = ({cartItem,addToCart,removeFromCart}) => { const calculateTotal=(items: CartItemType[])=>{ items.reduce((ack:number,item)=>ack + item.amount* item.price, 0) } return ( <Stack sx={{width:’25em’}}>… Read More Type 'void' is not assignable to type 'ReactNode'

Advertisements I’m trying to experiment custom Hooks with TS (quite new on both). This useOption should take etiher a number or a boolean, and return the value with the same type, and the changer function. This because an option should be <input> with ‘range’ type, and one <input> as checkbox (but this could be extended… Read More Custom Hooks with TypeScript – return value

Advertisements My state data: options: [ { id: 1, name: "Sale", isTrue: false, }, { id: 2, name: "New in", isTrue: false, }, ], And, in reducers I have: closeOptions: (state) => { state.options = state.options.map((item) => (item.isTrue = false)); }, But I am getting error in state.options with red underline in vscode. And, it… Read More Getting error on updating boolean state in Redux

Advertisements I have socket.io connection, I want to pass the original instance to other components. I am using Typescript React. It gives me error like: Type ‘{ socket: Socket<DefaultEventsMap, DefaultEventsMap>; }’ is not assignable to type ‘IntrinsicAttributes’. Property ‘socket’ does not exist on type ‘IntrinsicAttributes’.ts(2322) My code: main.tsx import React from "react"; import ReactDOM from… Read More How to pass socket connection to other components in React Typescript?

Advertisements I’ve been using this method to render multiple custom elements from an array but this is my first time doing it using a map data structure. It compiles fine but renders nothing. I’ve set up a codesandbox here. import "./styles.css"; import React from "react"; import ImageGrid from "./ImageGrid"; interface OnlineImage { id: string; url:… Read More How to render custom elements for each item in an object (Map data structure) in React TS?

Advertisements Goal: Enable to use function Test2 with argument value "Test 2" and then to be displayed without any error. Problem: When I apply the code "<Test2 thename={‘Test 2’} />", it shows an error saying "Objects are not valid as a React child (found: object with keys {thename}). If you meant to render a collection… Read More Function with argument won't display

Advertisements So, I am creating a website with typescript and redux and I am pulling an API from TMDB (the movie database), I have setup my redux and i got the store, after using use selector and useDispatch I should be able to map through the array, but when I try to map through it… Read More Property 'original_title' does not exist on type 'string' > TypeScript