react-bootstrap元素的ref问题

Question

I am trying to get the get value selected by a DropdownButton with ref='roleType', but whatever I tried fails.

    <DropdownButton ref='roleType' bsStyle='link' title='Role' key='1'  bsSize='xsmall'>
      {_items}
    </DropdownButton>

I have tried the followings:

 React.findDOMNode(this.refs.roleType)
 this.refs.roleType.getDOMNode()

Note: I am not sure if it is important or not. The DropdownButton is inside a Panel , which is inside a section of a div .

Answer 1

You should use the onSelect prop of DropdownButton , as noted on the docs .

var DropdownButton = ReactBootstrap.DropdownButton;
var MenuItem = ReactBootstrap.MenuItem;

var Hello = React.createClass ({
    getInitialState() { 
        return { key: null }
    },

    onSelect(key) {
        this.setState({ key: key });
    },

    render() {
        var selected = this.state.key ? <p>Selected: {this.state.key}</p> : '';
        return (<div>
        <DropdownButton bsStyle="primary" title="Test" onSelect={this.onSelect}>
          <MenuItem eventKey='1' active={this.state.key==='1'}>Action</MenuItem>
          <MenuItem eventKey='2' active={this.state.key==='2'}>Another action</MenuItem>
          <MenuItem eventKey='3' active={this.state.key==='3'}>Active Item</MenuItem>
          <MenuItem divider />
          <MenuItem eventKey='4' active={this.state.key==='4'}>Separated link</MenuItem>
        </DropdownButton>
        {selected}
        </div>);
    }
});

React.render(<Hello/>, document.getElementById('container'));

Here's a working fiddle:

https://jsfiddle.net/gadr/azm159g4/2/