如何在React中使用单选按钮？

我正在制作表格，我需要收音机输入。如何在onSubmit函数中获取已检查的无线电输入，这是正确的方法？

I'm making a form, and I was in need of a radio input. How do I get the checked radio input in a onSubmit-function, what is the correct way?

这是我的代码，我的myRadioInput变量包含选项A或我提交时的选项B：

This is my code, I myRadioInput-variable to contain either Option A or Option B when I submit:

React.createClass({
    handleSubmit: function() {
        e.preventDefault();
        var myTextInput = this.refs.myTextInput.getDOMNode().value.trim();
        var myRadioInput = "How ?";
    },
    render: function() {
        return (
            <form onSubmit={this.handleSubmit}>
                <input type="text" ref="myTextInput" />
                <label>
                    <span>Option A</span>
                    <input type="radio" name="myRadioInput" value="Option A"/>
                </label>
                <label>
                    <span>Option B</span>
                    <input type="radio" name="myRadioInput" value="Option B"/>
                </label>
                <input type="submit" value="Submit this"/>
            </form>
        )
    }
});