Delay component for Facebook React

Delay.js

/** @jsx React.DOM */

module React from 'react'

var Delay = React.createClass({
    propTypes: {
        by: React.PropTypes.number.isRequired,
    },

    getInitialState() {
        return {
            show: false,
        }
    },

    componentDidMount() {
        setTimeout(()=>this.setState({show: true}), this.props.by * 1000)
    },

    render() {
        return <g>
        {!this.state.show ? null :
            React.Children.map(this.props.children, child=>React.addons.cloneWithProps(child, this.props))}
        </g>
    },
})


module.exports = Delay