!npm bundle size
!npm

react-dropdown-aria

This component was created to be a light weight and fully accessible dropdown component for React. For a more feature heavy and powerful dropdown look to the react-select package. (This dropdown is inspired by react-select)

Upgrading to v3

Please take note when upgrading from v2 to v3 there are breaking changes. Be sure to carefully read the changelog entry for v3.0.0.

Features

1. Fully customizable styling (powered by styled-components)
2. Grouped options
3. Accessible
4. Searchable
5. Custom render function props
6. Typescript typings

$3

- Styled-components (Used for styling)

Demo And Examples

For demo and examples see https://jfangrad.github.io/react-dropdown-aria/

Installation

Simply use npm or yarn to install the package.
``
// Yarn
$ yarn add react-dropdown-aria styled-components

// npm
$ npm install --save react-dropdown-aria styled-components
`

You can then include it in your project as needed:
`js
import Dropdown from 'react-dropdown-aria';
`

Usage

Options should be provided to the Dropdown as an array of objects.

$3

`js
...
options: {[
{ value: 'one' },
{ value: 'two' },
{ value: 'three' }
]}
/>
`

Each option object in the array of options can have the following keys:

| key | Type | Default | Description |
|:---|:---|:---|:---|
| ariaLabel | string | null | Aria Label to be applied to the option |
| className | string | null | CSS class to be applied to this option |
| title | string | null | HTML title to be used for the option |
| value | string | null | The value to be displayed in the dropdown (Required) |

$3


Groups of items can also be implemented by pasing an array of objects of the following form to the dropdown options prop:
`js
...
options: {[
{ label: 'Group 1', groupOptions: optionsGroup1 },
{ label: 'Group 2', groupOptions: optionsGroup2 },
]}
/>
`
Where the groupOptions is an array of options as described above, and the label is the string to display above the group in the dropdown.

Styling

Custom styling can be applied to the dropdown through 2 ways:
1. CSS className props (As seen in props table below)
2. JavaScript Objects passed to the theme prop (Example)
3. Using the styled-components library (Example)

$3

The suggested method is by using the theme prop as shown in the Custom Styling Example.
The theme prop can have keys of the following form:
`typescript
type RdaTheme = {
wrapper?: ThemeObjectOrFunction;
selector?: ThemeObjectOrFunction;
selectorSearch?: ThemeObjectOrFunction;
selectedValue?: ThemeObjectOrFunction;
placeholder?: ThemeObjectOrFunction;
arrow?: ThemeObjectOrFunction;
optionContainer?: ThemeObjectOrFunction;
groupContainer?: ThemeObjectOrFunction;
groupHeading?: ThemeObjectOrFunction;
groupDivider?: ThemeObjectOrFunction;
optionItem?: ThemeObjectOrFunction;
};
`
As is shown above, each key in the theme object can be either a plain object or function. If you need access to the current state of the dropdown then you should pass a function which will be called with the appropiate state.
The theme object you provide will be merged with the default theme.

$3

If you would prefer to use option 3, you can apply styles to the sub components of the dropdown using the method described here. The sub components can be imported via
`js
import { StyledDropdownComponents } from 'react-dropdown-aria';
`
Each component is a property on that import and has the same keys as those listed above using typical component casing. (Example)

Dropdown Props

| Property | Type | Default | Description |
|:---|:---|:---|:---|
| ariaDescribedBy | string | null | ID of element that should be used to describe the dropdown |
| ariaLabel | string | null | Aria Label to be applied to the main dropdown button |
| ariaLabelledBy | string | null | ID of element that should be used as the label for the dropdown |
| arrowRenderer | function | undefined | Custom function to render the arrow for the dropdown |
| centerText | boolean | false | Whether main dropdown button text should be centered or not |
| className | string | undefined | CSS class to be applied to the drodown |
| contentClassName | string | undefined | CSS class to be applied to the dropdown option ul container |
| defaultOpen | boolean | false | Whether the dropdown should be open by default |
| disabled | boolean | false | Whether the dropdown should be disabled or not |
| height | number | null | Use to set the dropdown height manually |
| hideArrow | boolean | false | Controls whether dropdown component has the arrow or not |
| id | string | undefined | id to be passed to the main dropdown button |
| maxContentHeight | number | null | Controls the max height of the dropdown area that contains all options |
| onChange | function | undefined | Function called when the selected value changes |
| openUp | boolean | false | Whether dropdown should open up or not |
| optionRenderer | function | undefined | Custom function to render the options displayed in the dropdown |
| options | array | [] | Array of option objects |
| optionClassName | string | undefined | CSS class to be applied to all options in the dropdown |
| pageKeyTraverseSize | number | 10 | Number of options page up or page down will move the current focused by |
| placeholder | string | Select... | Placeholder value for dropdown |
| value | string | null | The value of the option that is currently selected (as set by setSelected). |
| selectedValueClassName | string | undefined | CSS class to be applied to main drodown button text |
| searchable | boolean | true | Whether or not the keyboard can be used to quickly navigate to an item through typing |
| theme | RdaTheme | undefined | Use to change the style of the dropdown through js instead of css (see styling section) |
| width | number | null | Use to set the dropdown width manually |

Developing

Clone the repo
`
git clone https://github.com/jfangrad/react-dropdown-aria.git
`

Install node modules
`
yarn install
`

Then in two seperate consoles start the library and demo
`
yarn lib:dev
yarn demo:start
``