Retrieving value from <select> with multiple option in React

Answer 1

In case you want to use ref you can get selected values like this:

var select = React.findDOMNode(this.refs.selectRef); 
var values = [].filter.call(select.options, function (o) {
      return o.selected;
    }).map(function (o) {
      return o.value;
    });

2018 ES6 update

  let select = this.refs.selectRef;
  let values = [].filter.call(select.options, o => o.selected).map(o => o.value);