React <select> Component (JSX)

select.jsx

/** @jsx React.DOM */
define(['reactjs'], function(React){

	return React.createClass({

		getDefaultProps: function(){
			return {
				multiple: false
				/*
				name: 'mySelect'
				options: [
					{
						value: optionOne
						label: "Option One"
					},
					{
						value: optionsTwo
						label: "Option Two",
						selected: true,
					}
				]


				 */
			}
		},

    	render: function() {
    		// the default value for the <select> (selected for ReactJS)
    		// http://facebook.github.io/react/docs/forms.html#why-select-value
    		var defaultValue; 

    		var options = this.props.options.map(function(opt, i){
    			// if this is the selected option, set the <select>'s defaultValue
    			if (opt.selected === true || opt.selected === 'selected') {
    				// if the <select> is a multiple, push the values
    				// to an array
    				if (this.props.multiple) {
    					if (defaultValue === undefined) {
    						defaultValue = [];
    					}
    					defaultValue.push( opt.value );
    				} else {
    					// otherwise, just set the value.
    					// NOTE: this means if you pass in a list of options with
    					// multiple 'selected', WITHOUT specifiying 'multiple',
    					// properties the last option in the list will be the ONLY item selected.
    					defaultValue = opt.value;
    				}
    			}

    			// attribute schema matches <option> spec; http://www.w3.org/TR/REC-html40/interact/forms.html#h-17.6
    			// EXCEPT for 'key' attribute which is requested by ReactJS
    			return <option key={i} value={opt.value} label={opt.label}>{opt.label}</option>;
    		}, this);

        	return 	<select 
        				defaultValue={defaultValue} 
        				multiple={this.props.multiple}
        				name={this.props.name}
        			>
        				{options}
        			</select>;
    	}
	});
});

Thanks for the hint to put defaultValue on the !