@seamonster-studios/rescript-downshift
v2.0.1
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Downshift ReScript Bindings
Install
yarn add @seamonster-studios/rescript-downshift @seamonster-studios/react-spread
Add the following to your bsconfig.json
...
"bs-dependencies": [..., "@seamonster-studios/rescript-downshift"],
...
use-select with ReForm and TailwindCSS example
/* FieldSelect.res ------------------------------------------------- */
open Belt
open Downshift
@react.component
let make = (
~items,
~disabled,
~className="",
~label,
~placeholder="Options",
~error: React.element,
~labelProps,
~toggleButtonProps,
~menuProps,
~selectedItem,
~itemToString: Js.Nullable.t<'a> => string,
~getItemProps,
~isOpen,
) => {
let value = itemToString(selectedItem)
<div className={`flex flex-col items-start ${className} relative`}>
<Spread props={labelProps}> {label} </Spread>
<Spread props={toggleButtonProps}>
<button
disabled
type_="button"
className="flex focus:bg-black hover:bg-black focus:text-white hover:text-white items-center justify-between border duration-300 w-full border-black rounded-md px-3 py-2 transition-all">
<span>
{switch selectedItem->Js.Nullable.toOption {
| None => placeholder
| Some(_) => value
}->React.string}
</span>
<Icons.DownArrow className="ml-2 p-1 w-5 h-auto" />
</button>
</Spread>
<Spread props={menuProps}>
<ul
className="bg-white transition-opacity opacity-0 absolute z-10 aria-expanded:opacity-100 max-h-40 overflow-y-auto w-full top-full mt-1 shadow-md">
{switch isOpen {
| false => React.null
| true => <>
{items
->Array.mapWithIndex((index, item) => {
let itemString = item->Js.Nullable.return->itemToString
<Spread key={`${value}${index->string_of_int}`} props={getItemProps(index)}>
<li
className={`text-sm py-2 px-3 first:rounded-t aria-selected:text-white aria-selected:bg-black border border-l-black border-r-black last:rounded-b hover:cursor-pointer hover:bg-black hover:text-white transition-colors duration-500
${switch selectedItem->Js.Nullable.toOption {
| None => ""
| Some(_) =>
switch value == itemString {
| false => ""
| true => " bg-black text-white bg-opacity-60 "
}
}}`}>
{itemString->React.string}
</li>
</Spread>
})
->React.array}
</>
}}
</ul>
</Spread>
error
</div>
}
/* FormMaker.res ------------------------------------------------- */
open ReForm
open Belt
module Make = (Config: ReForm.Config) => {
include ReForm.Make(Config)
module Label = {
let className = "mb-2 uppercase"
@react.component
let make = (~label: option<string>=?, ~htmlFor: option<string>=?, ~className=className) =>
label->Option.mapWithDefault(React.null, label =>
<label className ?htmlFor> {React.string(label)} </label>
)
}
module Success = {
let className = "bg-green text-white px-4 py-2 rounded w-full block"
@react.component
let make = (~children, ~className as cn="") =>
<div className={`${className} ${cn}`}> children </div>
}
module Error = {
let className = "bg-red text-white px-4 py-2 rounded mt-1 w-full block"
@react.component
let make = (~fieldInterface: fieldInterface<'a>, ~className as cn="") =>
fieldInterface.error->Option.mapWithDefault(React.null, error =>
<div className={`${cn} ${className}`}> {error->str} </div>
)
}
module type MakeSelectConfig = {
type item
let itemToString: Js.Nullable.t<item> => string
}
module MakeSelect = (FieldConfig: MakeSelectConfig) => {
module UseSelect = Downshift.Select.Make({
type item = FieldConfig.item
})
open! UseSelect
@react.component
let make = (
~field: Config.field<'a>,
~renderOnMissingContext=React.null,
~disabled,
~label,
~placeholder=?,
~className=?,
~items,
) => {
let fieldInterface = useField(field)
let select = use(
options(
~items,
~selectedItem=fieldInterface->Option.mapWithDefault(Js.Nullable.null, fieldInterface =>
fieldInterface.value
),
~onSelectedItemChange={
changes => {
switch fieldInterface {
| None => ()
| Some(fieldInterface) =>
fieldInterface.validate()
changes["selectedItem"]->fieldInterface.handleChange
}
}
},
(),
),
)
React.useMemo6(
() =>
fieldInterface
->Option.map(fieldInterface =>
<FieldSelect
disabled
label={<Label label />}
selectedItem=fieldInterface.value
items
itemToString={FieldConfig.itemToString}
menuProps={select->getMenuProps}
labelProps={select->getLabelProps}
toggleButtonProps={select->getToggleButtonProps}
isOpen=select.isOpen
error={<Error fieldInterface />}
getItemProps={index => select->getItemProps(itemPropsOptions(~index, ()))}
?placeholder
?className
/>
)
->Option.getWithDefault(renderOnMissingContext),
(
className,
disabled,
select.isOpen,
fieldInterface->Option.map(({error}) => error),
fieldInterface->Option.map(({value}) => value),
fieldInterface->Option.map(({state}) => state),
),
)
}
}
}
/* MyForm.res ------------------------------------------------- */
open Belt
module Form = {
module Lenses = %lenses(
type state = {
color: Js.Nullable.t<string>,
}
)
module Form = FormMaker.Make(Lenses)
include Form
let schema = Form.Validation.Schema([
Custom({
field: Color,
meta: (),
predicate: values => values.color == Js.Nullable.null ? Error("Color is required") : Valid,
}),
])
}
module StringSelect = Form.MakeSelect({
type item = string
let itemToString = nullalbeItem => nullalbeItem->Js.Nullable.toOption->Option.getWithDefault("")
})
@react.component
let make = () => {
let (showSuccess, setShowSuccess) = React.useState(() => false)
let form = Form.use(
~validationStrategy=OnDemand,
~schema=Form.schema,
~initialState={color: Js.Nullable.null},
~onSubmit=({state: _state, send: _send}) => {
setShowSuccess(_ => true)
None
},
(),
)
<Form.Provider value=form>
<form
onSubmit={event => {
ReactEvent.Synthetic.preventDefault(event)
form.submit()
}}>
<div className="mb-4">
<StringSelect
field=Form.Lenses.Color
disabled=false
label="Your Favorite Color"
items=["Red", "Green", "Blue"]
/>
</div>
<div className="mt-6">
<Button
action=#onClick(
_ => {
setShowSuccess(_ => false)
form.submit()
},
)>
{"Submit"->str}
</Button>
</div>
{switch showSuccess {
| true =>
<Form.Success className="mt-6">
{"Success! May the force be with you. Always."->str}
</Form.Success>
| false => React.null
}}
</form>
</Form.Provider>
}