96 lines
2.1 KiB
TypeScript
96 lines
2.1 KiB
TypeScript
// @flow
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import React, { Component } from 'react';
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import classnames from 'classnames';
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interface Props {
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ariaLabel: string;
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size?: string;
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color?: string;
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renderLabel(): any;
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renderOptions(): any;
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}
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interface State {
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expanded: boolean;
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}
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export default class DropdownComponent extends Component<Props, State> {
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public static defaultProps = {
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color: 'default',
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size: 'sm'
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};
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public state: State = {
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expanded: false
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};
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private dropdown: HTMLElement | null;
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public componentDidMount() {
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document.addEventListener('click', this.clickOffHandler);
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}
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public componentWillUnmount() {
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document.removeEventListener('click', this.clickOffHandler);
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}
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public render() {
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const { ariaLabel, color, size, renderOptions, renderLabel } = this.props;
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const { expanded } = this.state;
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const toggleClasses = classnames([
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'dropdown-toggle',
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'btn',
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`btn-${color}`,
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`btn-${size}`
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]);
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return (
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<span
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className={`dropdown ${expanded ? 'open' : ''}`}
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ref={el => (this.dropdown = el)}
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>
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<a
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tabIndex={0}
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aria-haspopup="true"
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aria-expanded={expanded}
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aria-label={ariaLabel}
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className={toggleClasses}
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onClick={this.toggle}
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>
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{renderLabel()}
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<i className="caret" />
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</a>
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{expanded && renderOptions()}
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</span>
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);
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}
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public toggle = () => {
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this.setState({ expanded: !this.state.expanded });
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};
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public open = () => {
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this.setState({ expanded: true });
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};
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public close = () => {
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this.setState({ expanded: false });
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};
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private clickOffHandler = (ev: MouseEvent) => {
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// Only calculate if dropdown is open & we have the ref
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if (!this.state.expanded || !this.dropdown) {
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return;
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}
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// If it's an element that's not inside of the dropdown, close it up
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if (
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this.dropdown !== ev.target &&
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ev.target instanceof HTMLElement &&
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!this.dropdown.contains(ev.target)
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) {
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this.setState({ expanded: false });
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}
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};
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}
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