pass arguments like onChange and onClick to a react component with typescript

Question

I'm trying to create a page with react, for that I'm using typescript.

In the project there is a component that is an input and in it I want there to be an onChange function, but when I put it in the component, it has a red dash, indicating that there is an error, how could I pass the onChange correctly? I know how to do it using javascript, but not with typescript.

I made the code as follows:

import { StyledInput } from "./Input.styles";

export const Input = ( { onChange } ) => {
    return(
        <StyledInput onChange={onChange}/>
    )
}

Damian Green · Accepted Answer · 2022-06-18 20:03:58Z

1

You need to define the prop type, e.g.

export const Input = ( { onChange }:{ onChange:(x:string)=>void } ) => {

Or more precisely

type Props ={ onChange:React.ComponentProps<typeof<StyledInput>>['onChange'] }
export const Input = ( { onChange }:Props ) => {

This approach ensures that if you're 3rd party package type signature changes you still have the same precise type defined in your props

answered Jun 18, 2022 at 20:03

Damian Green

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