如何在 React 中使用单选按钮?

2022-01-21 00:00:00 reactjs radio-button javascript

我正在制作一个表格，我需要一个无线电输入.如何在 onSubmit 函数中获取选中的无线电输入，正确的方法是什么?

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 变量在我提交时包含选项 A 或选项 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>
        )
    }
});

推荐答案

您不应该使用 refs 来访问 DOM 节点并检查它们的值.相反，您应该将输入值链接到组件状态的属性.

You shouldn't use refs to get access to DOM nodes and inspect their value. Instead you should link the inputs value to a property on the component state.

这里有一些示例:https://facebook.github.io/react/docs/two-way-binding-helpers.html

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