I followed everything from documentation and watched the tutorial by Ben Awad on YouTube. And still, I cannot get it to work.
const TextField = (props: FieldHookConfig<{}>) => {
const [field] = useField(props);
return (
<div>
<input {...field} {...props}/>
</div>
);
};
I used the FieldHookConfig
as the type for the props because the useField
is expecting a string
or the FieldHookConfig
base on the Field.d.ts file. yet typescript is still not happy.
it complains right in this line <input {...field} {...props}/>
(property) JSX.IntrinsicElements.input: React.DetailedHTMLProps<React.InputHTMLAttributes<HTMLInputElement>, HTMLInputElement>
Type '{ ref?: string | ((instance: HTMLInputElement | null) => void) | RefObject<HTMLInputElement> | null | undefined; key?: string | number | undefined; ... 289 more ...; innerRef?: ((instance: any) => void) | undefined; } | { ...; } | { ...; }' is not assignable to type 'DetailedHTMLProps<InputHTMLAttributes<HTMLInputElement>, HTMLInputElement>'.
Type '{ ref?: string | ((instance: HTMLSelectElement | null) => void) | RefObject<HTMLSelectElement> | null | undefined; key?: string | number | undefined; ... 269 more ...; checked?: boolean | undefined; }' is not assignable to type 'DetailedHTMLProps<InputHTMLAttributes<HTMLInputElement>, HTMLInputElement>'.
Type '{ ref?: string | ((instance: HTMLSelectElement | null) => void) | RefObject<HTMLSelectElement> | null | undefined; key?: string | number | undefined; ... 269 more ...; checked?: boolean | undefined; }' is not assignable to type 'ClassAttributes<HTMLInputElement>'.
Types of property 'ref' are incompatible.
Type 'string | ((instance: HTMLSelectElement | null) => void) | RefObject<HTMLSelectElement> | null | undefined' is not assignable to type 'string | ((instance: HTMLInputElement | null) => void) | RefObject<HTMLInputElement> | null | undefined'.
Type '(instance: HTMLSelectElement | null) => void' is not assignable to type 'string | ((instance: HTMLInputElement | null) => void) | RefObject<HTMLInputElement> | null | undefined'.
Type '(instance: HTMLSelectElement | null) => void' is not assignable to type '(instance: HTMLInputElement | null) => void'.
Types of parameters 'instance' and 'instance' are incompatible.
Type 'HTMLInputElement | null' is not assignable to type 'HTMLSelectElement | null'.
Type 'HTMLInputElement' is missing the following properties from type 'HTMLSelectElement': length, options, selectedIndex, selectedOptions, and 4 more.ts(2322)
There are 2 problems, firstly, you cannot spread the props
variable on the <input>
element, due to the incompatible types (as specified in the error). Secondly, your generic type for FieldHookConfig
shouldn't be {}
, rather it should be string
So to fix it, suppose you are using your <TextField>
element like so
<TextField
name="firstName"
type="text"
placeholder="Jane"
/>
Then inside your TextField
definition, you will write
const TextField = (props: FieldHookConfig<string>) => {
const [field] = useField(props);
return (
<div>
{/* no need to pass the name field because Formik will accept
that prop internally and pass it to the field variable */}
<input {...field} placeholder={props.placeholder} type={props.type} />
</div>
);
};