Dropdown - Components - Design System

#Overview

Dropdowns are used with Forms (Code).

Show codeHide code

export const DropdownFieldDemo = () => {
  const form = useForm<{ fruits: ISelectOption<string> | null }>();
  return (
    <form onSubmit={form.handleSubmit(() => {})}>
      <DropdownField
        form={form}
        name="fruits"
        label="Favourite Fruit"
        items={fruitOptions}
        options={{
          required: {
            value: true,
            message: "Please provide a value",
          },
        }}
      />
      <ButtonGroup>
        <Button onClick={() => form.reset()}>Reset value</Button>
        <Button variant="primary" type="submit">
          Send
        </Button>
      </ButtonGroup>
    </form>
  );
};

Name	Type	Default	Description
form *	`UseFormReturn<TFieldValues>`	-	The connected form that the form field is part of
items *	`Array<ISelectOption>`	-	The selectable items
value *	`ISelectOption` \| `null` \| `undefined`	-	The value of the input field
dialogDescription	`string`	-	The description that is shown in the dialog option
dialogLabel	`ReactNode`	-	The title that is shown in the dialog option
disabled	`boolean`	-	If true, the input field is disabled
hasError	`boolean`	-	If true, turns the border red
helpText	`ReactNode`	-	A help text that can be displayed below the dropdown field
hideHelpAndValidation	`boolean`	-	Hides the help text and validation message
id	`string`	-	The id of the dropdown
labelOptionalAppendix	`ReactNode`	-	Marker inside the label, when the field is optional
labelRequiredAppendix	`ReactNode`	-	Marker inside the label, when the field is required
listboxOffset	`number`	`4` Distance between the listbox and the actual dropdown.
listboxPlacement	`"end"` \| `"start"`	`"start"` Placement of the dropdown listbox relative to the parent container. This is only needed if you manipulate the width of the dropdown listbox with styling.
name	`string`	-	The name of the dropdown
noWrap	`boolean`	-
onBlur	`FocusEventHandler<HTMLDropdownElement>`	-	Callback the field is blurred
onChange	`ChangeEventHandler<HTMLDropdownElement>`	-	Callback when the selected item changes
onMenuClose	`() => void`	-	Callback when the menu closes
onMenuOpen	`() => void`	-	Callback when the menu opens
onSelect	`ChangeEventHandler<HTMLDropdownElement>`	-	Callback when the selected item changes
options	`UseControllerProps<TFieldValues, TFieldName>["rules"]`	`{ required: { value: true, message: __("Required") } }`	The options that can be set for the registration of the field
placeholder	`string`	-	A hint for the expected value
ref	`Ref<HTMLButtonElement>`	-	Ref of the dropdown

#Interface ISelectOption

The interface ISelectOption<T> is used to define the items of the dropdown. It is generic typed and will receive the interface of your actual data definition. It has the following properties:

Name	Type	Default	Description
label *	`string`	-	The label of the option
value *	`T`	-	The value of the option
description	`string`	-	Description underneath the label on mobile viewports
disabled	`boolean`	-	If the option is disabled
icon	`ReactNode`	-	Icon in front of the label

#Customize item rendering

You can add an additional icon and a description for mobile viewports to the dropdown items.

import { LightModeIcon } from "@blocks/icons/LightMode";
import type { ISelectOption } from "@segments/dropdown";

const items: ISelectOption[] = [
  {
    label: "Light",
    description: "Always use the light design",
    value: "light",
    icon: <LightModeIcon />,
  },
  // ...
];

#Styling

Dropdowns are generic components, generic props are exposed for each to style them and preserve their type.

import { Dropdown, type GenericDropdownProps } from "@segments/dropdown";
import { type GenericYakComponentOf, styled } from "next-yak";

const StyledDropdown = styled(Dropdown)`
  margin-bottom: ${spacing[8]};
` as GenericYakComponentOf<GenericDropdownProps>;

#Autocomplete Dropdown

A Dropdown that lets you search for items by keyboard input.

Show codeHide code

export const AutocompleteDropdownFieldDemo = () => {
  const form = useForm<{ fruits: ISelectOption<string> | null }>();
  const [result, setResult] = useState<ISelectOption<string> | null>(null);
  return (
    <>
      <form
        onSubmit={form.handleSubmit(() => {
          setResult(form.getValues().fruits);
        })}
      >
        <AutocompleteDropdownField
          clearable
          form={form}
          name="fruits"
          label="Favourite Fruit"
          items={fruitOptions}
          options={{
            required: {
              value: true,
              message: "Please provide a value",
            },
          }}
        />
        <ButtonGroup>
          <Button onClick={() => form.reset()}>Reset value</Button>
          <Button variant="primary" type="submit">
            Send
          </Button>
        </ButtonGroup>
      </form>
      {result && <div>{`Submitted: ${result.value}`}</div>}
    </>
  );
};

Name	Type	Default	Description
form *	`UseFormReturn<TFieldValues>`	-	The connected form that the form field is part of
items *	`Array<ISelectOption>`	-	The selectable items
value *	`ISelectOption` \| `null` \| `undefined`	-	The value of the input field
clearable	`boolean`	-	If a selected item can be cleared again, default false
createNewValueMessage	`string`	-	The label that is shown above the creatable option
dialogLabel	`ReactNode`	-	The title that is shown in the dialog option
disabled	`boolean`	-	If true, the input field is disabled
hasError	`boolean`	-	If true, turns the border red
helpText	`ReactNode`	-	A help text that can be displayed below the input field
hideHelpAndValidation	`boolean`	-	Hides the help text and validation message
id	`string`	-	The id of the dropdown
labelOptionalAppendix	`ReactNode`	-	Marker inside the label, when the field is optional
labelRequiredAppendix	`ReactNode`	-	Marker inside the label, when the field is required
name	`string`	-	The name of the dropdown
noItemsMessage	`string`	-	The message that will show when there are no results left after filtering
noWrap	`boolean`	-
onBlur	`ChangeEventHandler<HTMLDropdownElement>`	-	Callback when the dropdown is blurred
onChange	`ChangeEventHandler<HTMLDropdownElement>`	-	Callback when the selected item changes and when dropdown changes
onCreateItem	`(inputValue: string) => Promise<ISelectOption \| undefined \| void>`	-	Async callback to create new items. An option for that is shown when the user types something that is not present as an item
onInputValueChange	`(inputValue: string) => Promise<void>`	-	An optional callback to filter items asynchronous - useful to fetch an API again
onMenuClose	`() => void`	-	Callback when the menu closes
onMenuOpen	`() => void`	-	Callback when the menu opens
onSelect	`ChangeEventHandler<HTMLDropdownElement>`	-	Callback when the selected item changes
options	`UseControllerProps<TFieldValues, TFieldName>["rules"]`	`{ required: { value: true, message: __("Required") } }`	The options that can be set for the registration of the field
placeholder	`string`	-	A hint for the expected value
ref	`Ref<HTMLButtonElement>`	-	Ref of the dropdown
showDialogBackButton	`boolean`	-	if true, the back button is shown in the dialog on mobile and tablet viewports

#Creating new items

When you pass an onCreateItem callback function, users can create and add new items to the dropdown that don't exist in the original list. This is useful for fields where users might need custom values.

Show codeHide code

export const CreatableAutocompleteDropdownFieldDemo = () => {
  const [creatableOptions, setCreatableOptions] = useState(fruitOptions);
  const [result, setResult] = useState<ISelectOption<string> | null>(null);
  const form = useForm<{ fruits: ISelectOption<string> }>();
  return (
    <>
      <form
        onSubmit={form.handleSubmit(() => {
          setResult(form.getValues().fruits);
        })}
      >
        <AutocompleteDropdownField
          form={form}
          name="fruits"
          label="Favourite Fruit"
          items={creatableOptions}
          onCreateItem={async (inputValue: string) => {
            const newValue = { label: inputValue, value: inputValue };
            setCreatableOptions([...fruitOptions, newValue]);
            return newValue;
          }}
          options={{
            required: {
              value: true,
              message: "Please provide a value",
            },
          }}
        />
        <Button type="submit">Send</Button>
      </form>
      {result && <div>{`Submitted: ${result.value}`}</div>}
    </>
  );
};

#Lazy loading items

If you're using an <AutocompleteDropdown /> or <MultiselectDropdown />, then you can implement the callback onInputValueChange to filter/fetch items. This is useful for data sources that can't be fully loaded initially. So you can use this callback to fetch the items with a new API request. The callback will be called on every keystroke - so it is recommended to implement this with a debounce function to avoid too many requests.

#Multiselect Dropdown

A Dropdown that let you select multiple items and also search for them by keyboard input.

Show codeHide code

export const MultiSelectDropdownFieldDemo = () => {
  const form = useForm<{ fruits: ISelectOption[] }>();
  const [result, setResult] = useState<ISelectOption[] | null>(null);
  return (
    <>
      <form
        onSubmit={form.handleSubmit(() => {
          setResult(form.getValues().fruits);
        })}
      >
        <MultiSelectDropdownField
          form={form}
          name="fruits"
          label="Favourite Fruit"
          items={fruitOptions}
          options={{
            required: {
              value: true,
              message: "Please provide a value",
            },
          }}
        />
        <ButtonGroup>
          <Button onClick={() => form.reset()}>Reset value</Button>
          <Button variant="primary" type="submit">
            Send
          </Button>
        </ButtonGroup>
      </form>
      {result && (
        <div>{`Submitted: ${result.map((item) => item.value).join(", ")}`}</div>
      )}
    </>
  );
};

Name	Type	Default	Description
form *	`UseFormReturn<TFieldValues>`	-	The connected form that the form field is part of
items *	`Array<ISelectOption>`	-	The selectable items
value *	`Array<ISelectOption>` \| `null` \| `undefined`	-	The value of the mutli select dropdown
createNewValueMessage	`string`	-	The label that is shown above the creatable option
dialogLabel	`ReactNode`	-	The title that is shown in the dialog option
disabled	`boolean`	-	If true, the input field is disabled
hasError	`boolean`	-	If true, turns the border red
helpText	`ReactNode`	-	A help text that can be displayed below the input field
hideHelpAndValidation	`boolean`	-	Hides the help text and validation message
id	`string`	-	The id of the dropdown
labelOptionalAppendix	`ReactNode`	-	Marker inside the label, when the field is optional
labelRequiredAppendix	`ReactNode`	-	Marker inside the label, when the field is required
name	`string`	-	The name of the dropdown
noItemsMessage	`string`	-	The message that will show when there are no results left after filtering
noOptionsMessage	`string`	-	The message that will show when all items have been selected
noWrap	`boolean`	-
onBlur	`FocusEventHandler<HTMLMultiSelectDropdownElement>`	-	Callback when the input field is blurred
onChange	`ChangeEventHandler<HTMLMultiSelectDropdownElement>`	-	Callback when the selected item changes and when input changes
onCreateItem	`(inputValue: string) => Promise<ISelectOption \| undefined \| void>`	-	Async callback to create new items. An option for that is shown when the user types something that is not present as an item
onInputValueChange	`(inputValue: string) => Promise<void>`	-	An optional callback to filter items asynchronous - useful to fetch an API again
options	`UseControllerProps<TFieldValues, TFieldName>["rules"]`	`{ required: { value: true, message: __("Required") } }`	The options that can be set for the registration of the field
placeholder	`string`	-	A hint for the expected value
ref	`Ref<HTMLButtonElement>`	-	the ref of the mutli select dropdown
showDialogBackButton	`boolean`	-	if true, the back button is shown in the dialog on mobile and tablet viewports

#Outside of a form

#Dropdown

Name	Type	Default	Description	Controls
items *	`Array<ISelectOption>`	-	The selectable items	-
value *	`ISelectOption` \| `null` \| `undefined`	-	The value of the input field	-
dialogDescription	`string`	-	The description that is shown in the dialog option
dialogLabel	`ReactNode`	-	The title that is shown in the dialog option	-
disabled	`boolean`	-	If true, the input field is disabled
hasError	`boolean`	-	If true, turns the border red
id	`string`	-	The id of the dropdown
listboxOffset	`number`	`4` Distance between the listbox and the actual dropdown.
listboxPlacement	`"end"` \| `"start"`	`"start"` Placement of the dropdown listbox relative to the parent container. This is only needed if you manipulate the width of the dropdown listbox with styling.
name	`string`	-	The name of the dropdown
onBlur	`FocusEventHandler<HTMLDropdownElement>`	-	Callback the field is blurred	-
onChange	`ChangeEventHandler<HTMLDropdownElement>`	-	Callback when the selected item changes	-
onMenuClose	`() => void`	-	Callback when the menu closes	-
onMenuOpen	`() => void`	-	Callback when the menu opens	-
onSelect	`ChangeEventHandler<HTMLDropdownElement>`	-	Callback when the selected item changes	-
placeholder	`string`	-	A hint for the expected value
ref	`Ref<HTMLButtonElement>`	-	Ref of the dropdown	-

#Autocomplete Dropdown

Name	Type	Default	Description	Controls
items *	`Array<ISelectOption>`	-	The selectable items	-
value *	`ISelectOption` \| `null` \| `undefined`	-	The value of the input field	-
clearable	`boolean`	-	If a selected item can be cleared again, default false
createNewValueMessage	`string`	-	The label that is shown above the creatable option
dialogLabel	`ReactNode`	-	The title that is shown in the dialog option	-
disabled	`boolean`	-	If true, the input field is disabled
hasError	`boolean`	-	If true, turns the border red
id	`string`	-	The id of the dropdown
name	`string`	-	The name of the dropdown
noItemsMessage	`string`	-	The message that will show when there are no results left after filtering
onBlur	`ChangeEventHandler<HTMLDropdownElement>`	-	Callback when the dropdown is blurred	-
onChange	`ChangeEventHandler<HTMLDropdownElement>`	-	Callback when the selected item changes and when dropdown changes	-
onCreateItem	`(inputValue: string) => Promise<ISelectOption \| undefined \| void>`	-	Async callback to create new items. An option for that is shown when the user types something that is not present as an item	-
onInputValueChange	`(inputValue: string) => Promise<void>`	-	An optional callback to filter items asynchronous - useful to fetch an API again	-
onMenuClose	`() => void`	-	Callback when the menu closes	-
onMenuOpen	`() => void`	-	Callback when the menu opens	-
onSelect	`ChangeEventHandler<HTMLDropdownElement>`	-	Callback when the selected item changes	-
placeholder	`string`	-	A hint for the expected value
ref	`Ref<HTMLButtonElement>`	-	Ref of the dropdown	-
showDialogBackButton	`boolean`	-	if true, the back button is shown in the dialog on mobile and tablet viewports

#Multiselect Dropdown

Name	Type	Default	Description	Controls
items *	`Array<ISelectOption>`	-	The selectable items	-
value *	`Array<ISelectOption>` \| `null` \| `undefined`	-	The value of the mutli select dropdown	-
createNewValueMessage	`string`	-	The label that is shown above the creatable option
dialogLabel	`ReactNode`	-	The title that is shown in the dialog option	-
disabled	`boolean`	-	If true, the input field is disabled
hasError	`boolean`	-	If true, turns the border red
id	`string`	-	The id of the dropdown
name	`string`	-	The name of the dropdown
noItemsMessage	`string`	-	The message that will show when there are no results left after filtering
noOptionsMessage	`string`	-	The message that will show when all items have been selected
onBlur	`FocusEventHandler<HTMLMultiSelectDropdownElement>`	-	Callback when the input field is blurred	-
onChange	`ChangeEventHandler<HTMLMultiSelectDropdownElement>`	-	Callback when the selected item changes and when input changes	-
onCreateItem	`(inputValue: string) => Promise<ISelectOption \| undefined \| void>`	-	Async callback to create new items. An option for that is shown when the user types something that is not present as an item	-
onInputValueChange	`(inputValue: string) => Promise<void>`	-	An optional callback to filter items asynchronous - useful to fetch an API again	-
placeholder	`string`	-	A hint for the expected value
ref	`Ref<HTMLButtonElement>`	-	the ref of the mutli select dropdown	-
showDialogBackButton	`boolean`	-	if true, the back button is shown in the dialog on mobile and tablet viewports

#Colors

Generated from Figma Showcase

Token name
LABEL_TEXT#0009#fffb#0009#fffb
FIELD_BORDER#bbb#fff4#bbb#fff4
VALUE_TEXT#0004#fff4#0004#fff4
ICONAFTER_BACKGROUND#000d#fffb#000d#fffb
CHEVRON#000d#fffb#000d#fffb
ICON_SHAPE#000d#fffb#000d#fffb
FIELD_BACKGROUND#fff#111#fff#111
HELP_TEXT#0009#fffb#0009#fffb
LABEL_TEXT_FOCUS#0009#fffb#0009#fffb
FIELD_BORDER_FOCUS#555#fff#059#fff
VALUE_TEXT_FOCUS#0004#fff4#0004#fff4
ICONAFTER_BACKGROUND_FOCUS#000d#fffb#000d#fffb
FIELD_BACKGROUND_FOCUS#fff#111#fff#111
HELP_TEXT_FOCUS#0009#fffb#0009#fffb
LABEL_TEXT_DISABLED#0009#fffb#0009#fffb
FIELD_BACKGROUND_DISABLED#0000#fff1#0000#fff1
FIELD_BORDER_DISABLED#0001#fff1#0001#fff1
VALUE_TEXT_DISABLED#0004#fff4#0004#fff4
ICONAFTER_BACKGROUND_DISABLED#0004#fff4#0004#fff4
CHEVRON_DISABLED#0004#fff4#0004#fff4
ICON_SHAPE_DISABLED#0004#fff4#0004#fff4
HELP_TEXT_DISABLED#0009#fffb#0009#fffb
LABEL_TEXT_ERROR#0009#fffb#0009#fffb
FIELD_BORDER_ERROR#f75#f75#e02#f55
VALUE_TEXT_ERROR#0004#fff4#0004#fff4
ICONAFTER_BACKGROUND_ERROR#000d#fffb#000d#fffb
CHEVRON_ERROR#000d#fffb#000d#fffb
ICON_SHAPE_ERROR#000d#fffb#000d#fffb
FIELD_BACKGROUND_ERROR#fff#111#fff#111
HELP_TEXT_ERROR#c42#f75#e02#f44
LABEL_TEXT_FILLED#0009#fffb#0009#fffb
FIELD_BORDER_FILLED#555#fff#059#fff
VALUE_TEXT_FILLED#000#fff#000#fff
ICONAFTER_BACKGROUND_FILLED#000d#fffb#000d#fffb
CHEVRON_FILLED#000d#fffb#000d#fffb
ICON_SHAPE_FILLED#000d#fffb#000d#fffb
FIELD_BACKGROUND_FILLED#fff#111#fff#111
HELP_TEXT_FILLED#0009#fffb#0009#fffb

#Overview

#Interface ISelectOption

#Customize item rendering

#Styling

#Autocomplete Dropdown

#Creating new items

#Lazy loading items

#Multiselect Dropdown

#Outside of a form

#Dropdown

#Autocomplete Dropdown

#Multiselect Dropdown

#Colors

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