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Simple react modal using portals
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import React from 'react' | |
import PropTypes from 'prop-types' | |
import ReactDOM from 'react-dom' | |
import cx from 'classnames' | |
const TAB_KEY = 9 | |
const ESC_KEY = 27 | |
const FOCUSABLE_ELEMENTS = ['INPUT', 'BUTTON', 'SELECT', 'TEXTAREA', 'A'] | |
class ModalPortal extends React.Component { | |
constructor (props) { | |
super(props) | |
this.shouldClose = null | |
} | |
handleContentOnClick = () => { | |
this.shouldClose = false | |
} | |
handleContentOnMouseDown = () => { | |
this.shouldClose = false | |
} | |
handleContentOnMouseUp = () => { | |
this.shouldClose = false | |
} | |
handleOverlayOnClick = (event) => { | |
if (this.shouldClose === null) { | |
this.shouldClose = true | |
} | |
if (this.shouldClose) { | |
this.requestClose(event) | |
} | |
this.shouldClose = null | |
} | |
componentDidUpdate (prevProps, prevState) { | |
if (prevProps.isOpen !== this.props.isOpen && this.props.isOpen) { | |
this.focusContent() | |
} | |
} | |
focusContent = () => { | |
this.content && this.content.focus() | |
} | |
requestClose = (event) => { | |
this.props.onRequestClose && this.props.onRequestClose(event) | |
} | |
setContentRef = (ref) => { | |
this.content = ref | |
} | |
handleKeyDown = (event) => { | |
if (document.activeElement && FOCUSABLE_ELEMENTS.indexOf(document.activeElement.nodeName) !== -1) return | |
if (event.keyCode === ESC_KEY) { | |
event.stopPropagation() | |
this.requestClose(event) | |
} | |
} | |
render () { | |
const { isOpen, inline } = this.props | |
if (!isOpen) return null | |
const contentClass = cx('ola-modal-content', this.props.contentClassName) | |
const overlayClass = cx('ola-modal-overlay', { | |
'ola-modal-inline': inline | |
}) | |
return ( | |
<div | |
className={overlayClass} | |
aria-modal='true' | |
onClick={this.handleOverlayOnClick} | |
> | |
<div | |
className={contentClass} | |
onClick={this.handleContentOnClick} | |
ref={this.setContentRef} | |
onKeyDown={this.handleKeyDown} | |
onMouseDown={this.handleContentOnMouseDown} | |
onMouseUp={this.handleContentOnMouseUp} | |
tabIndex='-1' | |
> | |
<button className='ola-modal-close' onClick={this.requestClose}> | |
Close | |
</button> | |
{inline ? ( | |
this.props.children | |
) : ( | |
<div className='ola-modal-body'>{this.props.children}</div> | |
)} | |
</div> | |
</div> | |
) | |
} | |
} | |
class Portal extends React.Component { | |
constructor (props) { | |
super(props) | |
this.el = document.createElement('div') | |
this.el.className = props.className | |
} | |
static defaultProps = { | |
isOpen: false, | |
className: 'ola-modal-portal', | |
inline: false, | |
contentClassName: 'ola-modal-content-small' | |
} | |
componentDidMount () { | |
document.body.appendChild(this.el) | |
} | |
componentWillUnmount () { | |
document.body.removeChild(this.el) | |
} | |
render () { | |
return ReactDOM.createPortal(<ModalPortal {...this.props} />, this.el) | |
} | |
} | |
Portal.propTypes = { | |
children: PropTypes.node.isRequired, | |
onRequestClose: PropTypes.func, | |
contentClassName: PropTypes.string | |
} | |
export default Portal |
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