A Nice React Dropdown Component

React Dropdown component

A Nice React Dropdown Component.

Installation

1. Install the latest version of react and react-dropdown:

npm install --save react @trendmicro/react-dropdown

2. At this point you can import @trendmicro/react-dropdown and its styles in your application as follows:

import Dropdown, {
    DropdownToggle,
    DropdownMenu,
    DropdownMenuWrapper,
    MenuItem,
    DropdownButton
} from '@trendmicro/react-dropdown';

// Be sure to include styles at some point, probably during your bootstraping
import '@trendmicro/react-buttons/dist/react-buttons.css';
import '@trendmicro/react-dropdown/dist/react-dropdown.css';

Recommended Setup

Create a common components directory including both Buttons and Dropdown components, as shown below:

components/
  Buttons/
    index.js
  Dropdown/
    index.js

components/Buttons/index.js

import '@trendmicro/react-buttons/dist/react-buttons.css';

export { Button, ButtonGroup, ButtonToolbar } from '@trendmicro/react-buttons';

components/Dropdown/index.js

import '@trendmicro/react-dropdown/dist/react-dropdown.css';
import Dropdown from '@trendmicro/react-dropdown';
import '../Buttons'; // Ensure CSS dependency

export default Dropdown;
export {
    DropdownToggle,
    DropdownMenu,
    DropdownMenuWrapper,
    MenuItem,
    DropdownButton
} from '@trendmicro/react-dropdown';

Then, import Dropdown component in your code:

import Dropdown from './components/Dropdown';

Custom Styling

You can make style changes using inline styles or styled-components, and specify propTypes and defaultProps by setting them as properties on the function.

Inline Styles

const CustomDropdownMenu = (props) => (
    <Dropdown.Menu {...props} style={{ padding: '2px 0' }} />
);
CustomDropdownMenu.propTypes = Dropdown.Menu.propTypes;
CustomDropdownMenu.defaultProps = Dropdown.Menu.defaultProps;

Styled Components

const CustomDropdownMenu = styled(Dropdown.Menu)`
    padding: 2px 0;
`;
CustomDropdownMenu.propTypes = Dropdown.Menu.propTypes;
CustomDropdownMenu.defaultProps = Dropdown.Menu.defaultProps;

To increase the CSS specificity of a rule, you can simply repeat a selector, like so:

const CustomMenuItem = styled(MenuItem)`
&& {
    a {
        &:hover {
            background: ${styleConstants.selectionColor};
        }
        padding: 0 6px;
    }
}
`;
CustomMenuItem.propTypes = MenuItem.propTypes;
CustomMenuItem.defaultProps = MenuItem.defaultProps;

Usage

Dropdown

<Dropdown
    onSelect={(eventKey) => {
    }}
>
    <Dropdown.Toggle
        btnStyle="flat"
    >
        Toggler
    </Dropdown.Toggle>
    <Dropdown.Menu>
        <MenuItem header>Header</MenuItem>
        <MenuItem eventKey={1}>link</MenuItem>
        <MenuItem divider />
        <MenuItem header>Header</MenuItem>
        <MenuItem eventKey={2}>link</MenuItem>
        <MenuItem eventKey={3} disabled>disabled</MenuItem>
        <MenuItem
            eventKey={4}
            title="link with title"
        >
            link with title
        </MenuItem>
        <MenuItem
            eventKey={5}
            active
            onSelect={(eventKey) => {
                alert(`Alert from menu item.\neventKey: ${eventKey}`);
            }}
        >
            link that alerts
        </MenuItem>
    </Dropdown.Menu>
</Dropdown>

Multi-Level Dropdown

<Dropdown>
    <Dropdown.Toggle title="Select an option" />
    <Dropdown.Menu>
        <MenuItem>
            Menu item one
        </MenuItem>
        <MenuItem>
            Menu item two
        </MenuItem>
        <MenuItem>
            Menu item three
        </MenuItem>
        <MenuItem divider />
        <MenuItem>
            Menu item four
            <MenuItem>
                Second level item one
            </MenuItem>
            <MenuItem>
                Second level item two
            </MenuItem>
            <MenuItem>
                Second level item three
                <MenuItem>
                    Third level item one
                </MenuItem>
            </MenuItem>
        </MenuItem>
    </Dropdown.Menu>
</Dropdown>

Dropdown Menu Wrapper

<Dropdown>
    <Dropdown.Toggle title="Select an option" />
    <Dropdown.MenuWrapper>
        <SearchFilter />
        <Dropdown.Menu>
            <MenuItem>
                Menu item one
            </MenuItem>
            <MenuItem>
                Menu item two
            </MenuItem>
            <MenuItem>
                Menu item three
            </MenuItem>
        </Dropdown.Menu>
    </Dropdown.MenuWrapper>
</Dropdown>

Dropdown Button

<DropdownButton
    btnSize="xs"
    title="More"
    onSelect={(eventKey) => {
    }}
>
    <MenuItem eventKey={1}>link</MenuItem>
    <MenuItem eventKey={2}>link</MenuItem>
</DropdownButton>

API

Properties

Dropdown

DropdownToggle

DropdownMenu

DropdownMenuWrapper

MenuItem

DropdownButton

GitHub