I just started a project on React Native with Typescript and came along Formik in order to build form in my application.
I did the great formik tutorial guide and saw the use of formik with RN section in JS.
However, when I tried to translate this example into typescript, then I got the following typing error on the Button's onPress attribute
:
No overload matches this call.
Overload 1 of 2, '(props: Readonly<ButtonProps>): Button', gave the following error.
Type '(e?: FormEvent<HTMLFormElement>) => void' is not assignable to type '(ev: NativeSyntheticEvent<NativeTouchEvent>) => void'.
Types of parameters 'e' and 'ev' are incompatible.
Type 'NativeSyntheticEvent<NativeTouchEvent>' is not assignable to type 'FormEvent<HTMLFormElement>'.
Types of property 'nativeEvent' are incompatible.
Type 'NativeTouchEvent' is missing the following properties from type 'Event': bubbles, cancelBubble, cancelable, composed, and 17 more.
Overload 2 of 2, '(props: ButtonProps, context?: any): Button', gave the following error.
Type '(e?: FormEvent<HTMLFormElement>) => void' is not assignable to type '(ev: NativeSyntheticEvent<NativeTouchEvent>) => void'.ts(2769)
index.d.ts(6926, 5): The expected type comes from property 'onPress' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<Button> & Readonly<ButtonProps> & Readonly<{ children?: ReactNode; }>'
index.d.ts(6926, 5): The expected type comes from property 'onPress' which is declared here on type 'IntrinsicAt...
From what I understand, the handleSubmit
function (e?: FormEvent<HTMLFormElement>) => void
, accepts an event from a form submission (onSubmit
attribute of a form
element). Since there is no Form equivalent in RN, it complains receiving the (ev: NativeSyntheticEvent<NativeTouchEvent>) => void
from the RN Button's onPress
attribute.
In order to get rid of the error and keep going, I used this following workaround which I'm not satisfied with :
<Button
title="Do it !"
color={colors.red}
onPress={
(handleSubmit as unknown) as (
ev: NativeSyntheticEvent<NativeTouchEvent>
) => void
}
/>
I'd like to know how should I solve this typing error properly.
Thank you for your help.