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createField.tsx
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createField.tsx
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import { FieldApi } from '@tanstack/form-core'
import {
createComponent,
createComputed,
createMemo,
createSignal,
onCleanup,
onMount,
} from 'solid-js'
import type {
DeepKeys,
DeepValue,
Narrow,
Validator,
} from '@tanstack/form-core'
import type { JSXElement } from 'solid-js'
import type { CreateFieldOptions } from './types'
declare module '@tanstack/form-core' {
// eslint-disable-next-line no-shadow
interface FieldApi<
TParentData,
TName extends DeepKeys<TParentData>,
TFieldValidator extends
| Validator<DeepValue<TParentData, TName>, unknown>
| undefined = undefined,
TFormValidator extends
| Validator<TParentData, unknown>
| undefined = undefined,
TData extends DeepValue<TParentData, TName> = DeepValue<TParentData, TName>,
> {
Field: FieldComponent<TParentData, TFormValidator>
}
}
export type CreateField<
TParentData,
TFormValidator extends
| Validator<TParentData, unknown>
| undefined = undefined,
> = <
TName extends DeepKeys<TParentData>,
TFieldValidator extends
| Validator<DeepValue<TParentData, TName>, unknown>
| undefined = undefined,
TData extends DeepValue<TParentData, TName> = DeepValue<TParentData, TName>,
>(
opts: () => { name: Narrow<TName> } & Omit<
CreateFieldOptions<
TParentData,
TName,
TFieldValidator,
TFormValidator,
TData
>,
'form'
>,
) => () => FieldApi<TParentData, TName, TFieldValidator, TFormValidator, TData>
// ugly way to trick solid into triggering updates for changes on the fieldApi
function makeFieldReactive<FieldApiT extends FieldApi<any, any, any, any>>(
fieldApi: FieldApiT,
): () => FieldApiT {
const [flag, setFlag] = createSignal(false)
const fieldApiMemo = createMemo(() => [flag(), fieldApi] as const)
const unsubscribeStore = fieldApi.store.subscribe(() => setFlag((f) => !f))
onCleanup(unsubscribeStore)
return () => fieldApiMemo()[1]
}
export function createField<
TParentData,
TName extends DeepKeys<TParentData>,
TFieldValidator extends
| Validator<DeepValue<TParentData, TName>, unknown>
| undefined = undefined,
TFormValidator extends
| Validator<TParentData, unknown>
| undefined = undefined,
TData extends DeepValue<TParentData, TName> = DeepValue<TParentData, TName>,
>(
opts: () => CreateFieldOptions<
TParentData,
TName,
TFieldValidator,
TFormValidator,
TData
>,
): () => FieldApi<TParentData, TName, TFieldValidator, TFormValidator, TData> {
const options = opts()
const fieldApi = new FieldApi(options)
fieldApi.Field = Field as never
/**
* fieldApi.update should not have any side effects. Think of it like a `useRef`
* that we need to keep updated every render with the most up-to-date information.
*
* createComputed to make sure this effect runs before render effects
*/
createComputed(() => fieldApi.update(opts()))
// Instantiates field meta and removes it when unrendered
onMount(() => onCleanup(fieldApi.mount()))
return makeFieldReactive(fieldApi) as never
}
type FieldComponentProps<
TParentData,
TName extends DeepKeys<TParentData>,
TFieldValidator extends
| Validator<DeepValue<TParentData, TName>, unknown>
| undefined = undefined,
TFormValidator extends
| Validator<TParentData, unknown>
| undefined = undefined,
TData extends DeepValue<TParentData, TName> = DeepValue<TParentData, TName>,
> = {
children: (
fieldApi: () => FieldApi<
TParentData,
TName,
TFieldValidator,
TFormValidator,
TData
>,
) => JSXElement
} & Omit<
CreateFieldOptions<
TParentData,
TName,
TFieldValidator,
TFormValidator,
TData
>,
'form'
>
export type FieldComponent<
TParentData,
TFormValidator extends
| Validator<TParentData, unknown>
| undefined = undefined,
> = <
TName extends DeepKeys<TParentData>,
TFieldValidator extends
| Validator<DeepValue<TParentData, TName>, unknown>
| undefined = undefined,
TData extends DeepValue<TParentData, TName> = DeepValue<TParentData, TName>,
>({
children,
...fieldOptions
}: Omit<
FieldComponentProps<
TParentData,
TName,
TFieldValidator,
TFormValidator,
TData
>,
'form'
>) => JSXElement
export function Field<
TParentData,
TName extends DeepKeys<TParentData>,
TFieldValidator extends
| Validator<DeepValue<TParentData, TName>, unknown>
| undefined = undefined,
TFormValidator extends
| Validator<TParentData, unknown>
| undefined = undefined,
TData extends DeepValue<TParentData, TName> = DeepValue<TParentData, TName>,
>(
props: {
children: (
fieldApi: () => FieldApi<
TParentData,
TName,
TFieldValidator,
TFormValidator,
TData
>,
) => JSXElement
} & CreateFieldOptions<
TParentData,
TName,
TFieldValidator,
TFormValidator,
TData
>,
) {
const fieldApi = createField<
TParentData,
TName,
TFieldValidator,
TFormValidator,
TData
>(() => {
const { children, ...fieldOptions } = props
return fieldOptions
})
return <>{createComponent(() => props.children(fieldApi), {})}</>
}