定义延迟加载的组件:
import React from 'react';
import PropTypes from 'prop-types';
class Delayed extends React.Component {
constructor(props) {
super(props);
this.state = {hidden : true};
}
componentDidMount() {
setTimeout(() => {
this.setState({hidden: false});
}, this.props.waitBeforeShow);
}
render() {
return this.state.hidden ? '' : this.props.children;
}
}
Delayed.propTypes = {
waitBeforeShow: PropTypes.number.isRequired
};
export default Delayed;
使用方式:
import Delayed from '../Time/Delayed';
import React from 'react';
const myComp = props => (
<Delayed waitBeforeShow={500}>
<div>Some child</div>
</Delayed>
)
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…