I’m working on a React application, and I have a component that renders a list of items. I’ve noticed that as the list grows, the component’s performance degrades. Here’s the code for the component import React, { useState, useEffect }…
I'm trying to add and remove widow event listeners on opening and closing a component. Issue is that isOpen in the handler is always at it's inital condition and doesn't use the latest state. How can I tackle this problem?…
I reused my alert message system I wrote in a an older version of React (maybe 16?) and that was working fine, but in this new project (using React 18) it doesn't work and I don't understand why. I created…
Imagine the following situation: I have a registration flow in which some parts of this registration are saved in the session storage to be sent at the end of the flow for an API request. On one of these screens,…
I used useState hook for a todos array const [todos, setTodos] = useState([]); ` I'm using this array to display and index of all todos. I also need the todos for the initial mount, so I'm using useEffect hook. `…
When i am clicking on submit button error not showing in form validation. But when i am changing any text in input field it's giving errors. Like i am not filling fname field and submitting form it's not showing anything…
I am trying to update Book in Update page, and am not sure how to use old values instead of all inputs being cleared, and am not sure where to look at for it. Below is my form in Update…
VSCode doesn't mark this as invalid, despite the hooks being conditionally called: function useHook() { return 1; } function useHook2() { const two = useMemo(() => 2, []); return two; } const hookDictionary = { useHook, useHook2 } export function…
I am studying Front end development and am writing simple shopping cart in React to learn. When I change product quantity I want to create an object of quantity values by product id and pass them to shopping cart component…
I have some problems regarding React code. Inside my App.jsx, I wrote the logic with and without the destructuring of an object I get from an jsx tag: <input name="fName" placeholder="First Name" onChange={handleChange} value={fullName.fName} /> <input name="lName" placeholder="Last Name" onChange={handleChange}…