hometown/app/javascript/mastodon/components/collapsable.js
Sorin Davidoi 2c405aed55 Performance improvements (#3168)
* refactor(components/status_list): Avoid quering scrollTop if not necessary

* refactor(components/dropdown_menu): Do not render items if not expanded

* refactor: Cherry-pick react-motion imports

* refactor(compose/privacy_dropdown): Do not render options if not open

* refactor(components/column_collapsable): Do not render children if collapsed
2017-05-20 14:58:13 +02:00

23 lines
818 B
JavaScript

import React from 'react';
import Motion from 'react-motion/lib/Motion';
import spring from 'react-motion/lib/spring';
import PropTypes from 'prop-types';
const Collapsable = ({ fullHeight, isVisible, children }) => (
<Motion defaultStyle={{ opacity: !isVisible ? 0 : 100, height: isVisible ? fullHeight : 0 }} style={{ opacity: spring(!isVisible ? 0 : 100), height: spring(!isVisible ? 0 : fullHeight) }}>
{({ opacity, height }) =>
<div style={{ height: `${height}px`, overflow: 'hidden', opacity: opacity / 100, display: Math.floor(opacity) === 0 ? 'none' : 'block' }}>
{children}
</div>
}
</Motion>
);
Collapsable.propTypes = {
fullHeight: PropTypes.number.isRequired,
isVisible: PropTypes.bool.isRequired,
children: PropTypes.node.isRequired
};
export default Collapsable;