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react_recoil_basic_text_input_with_atom_state.ts
typescriptA basic counter application demonstrating the use of RecoilRoot, atoms, and the u
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react_recoil_basic_text_input_with_atom_state.ts
1import React from 'react';
2import {
3 RecoilRoot,
4 atom,
5 useRecoilState,
6} from 'recoil';
7
8// 1. Define an atom (shared state)
9const textState = atom<string>({
10 key: 'textState', // unique ID (with respect to other atoms/selectors)
11 default: '', // default value (aka initial value)
12});
13
14// 2. Create a component that uses the atom
15function TextInput() {
16 const [text, setText] = useRecoilState(textState);
17
18 const onChange = (event: React.ChangeEvent<HTMLInputElement>) => {
19 setText(event.target.value);
20 };
21
22 return (
23 <div>
24 <input type="text" value={text} onChange={onChange} />
25 <br />
26 Echo: {text}
27 </div>
28 );
29}
30
31// 3. Wrap the app in RecoilRoot
32export default function App() {
33 return (
34 <RecoilRoot>
35 <TextInput />
36 </RecoilRoot>
37 );
38}