Reputation: 457
I'm trying to get text from a input element, setting it to state and then rendering it back into the input box. However I think my event typing is wrong? I've searched online and tried implementing many solutions but none have worked so far. Any help is appreciated.
my component:
import React, { ChangeEvent, ChangeEventHandler, useState } from "react";
export default function Unidirectionflow() {
const [state4, setState4] = useState("");
const [state5, setState5] = useState("");
let handleChange4 = (e: React.FormEvent<HTMLInputElement>): void => {
setState3((e.target as HTMLInputElement).value);
};
let handleChange5 = (event: ChangeEvent<HTMLInputElement>) => {
setState5(event.currentTarget.value);
};
return (
<main>
<input type="text" value={state4} onChange={() => handleChange4} />
<input type="text" value={state5} onChange={() => handleChange5} />
</main>
);
}
Typescript input onchange event.target.value
React TypeScript: Correct Types for onChange
Can't type in React TextField Input
https://react-typescript-cheatsheet.netlify.app/docs/basic/getting-started/forms_and_events/
Upvotes: 1
Views: 29648
Reputation: 8846
Just do this:
handleChange = (event: Event) => {
const { value } = event.target as unknown as { value: string };
setState(value);
};
<input type='text' onChange={handleChange} />
And the squeegee lines will go away.
Upvotes: 1
Reputation: 491
You can do like this
export default function Unidirectionflow() {
const [states, setStates] = useState({
state3:'',
state4:''
})
const handleChange = (
e: React.ChangeEvent<HTMLTextAreaElement | HTMLInputElement>
) => {
setStates({
...states,
[e.target.name]: e.target.value.trim(),
});
};
return (
<main>
<input type="text" name="state3" value={states.state3} onChange={handleChange} />
<input type="text" name="state4" value={states.state4} onChange={handleChange} />
</main>
);
};
Upvotes: 4
Reputation: 13265
You have forgot to pass the event
when calling the function
Try this
onChange={(e) => handleChange(e)}
Or
onChange={handleChange}
Code sandbox => https://codesandbox.io/s/dreamy-pateu-1mc6j?file=/src/App.tsx
Upvotes: -2