Paper cannot be resized while children are left for caller

[leftstick]

class Panel extends React.Component {

    constructor(props) {
        super(props);
        let paperStyle = {
            minHeight: '350px',
            width: '850px',
            margin: '5px auto 0 auto',
            backgroundColor: Mui.Styles.Colors.blueGrey50
        };

        this.state = {paperStyle};
    }

    _getWindowWidth() {
        let element = document.documentElement;
        let body = document.getElementsByTagName('body')[0];
        let width = window.innerWidth || element.clientWidth || body.clientWidth;
        return width;
    }

    _onResize(e) {
        let originalStyle = this.state.paperStyle;
        if (this._getWindowWidth() <= 850) {
            originalStyle.width = '100%';
        } else {
            originalStyle.width = '850px';
        }
        this.setState({paperStyle: originalStyle});
    }

    componentWillMount() {
        window.addEventListener('resize', this._onResize, false);
    }

    componentWillUnmount() {
        window.removeEventListener('resize', this._onResize, false);
    }

    render() {
        let Paper = Mui.Paper;
        return (
            <Paper style={this.state.paperStyle} zDepth={1} rounded={false}>
              <TodoInput/>
            </Paper>
            );
    }
}

export default Panel;

The code works well as above, while i have component TodoInput inside Paper, but if i change the render method like following:

    render() {
        let Paper = Mui.Paper;
        return (
            <Paper style={this.state.paperStyle} zDepth={1} rounded={false}>
               { this.props.children }
            </Paper>
            );
    }

I was expecting this Panel can used as a auto resizable component in other places, but unfortunately it doesn't work.

Since i am new to React , i am wondering if it is a bug or i am in the wrong way?

[leftstick]

Weird issue, once i set zDepth as an changeable state, as following:

zDepth={this.state.zDepth}

The resize feature works