React 表单实例

源代码

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8" />
    <title>React 表单 实例</title>
    <script src="https://cdn.staticfile.org/react/16.4.0/umd/react.development.js"></script>
    <script src="https://cdn.staticfile.org/react-dom/16.4.0/umd/react-dom.development.js"></script>
    <script src="https://cdn.staticfile.org/babel-standalone/6.26.0/babel.min.js"></script>
</head>

<body>
    <div id="example"></div>
    <script type="text/babel">
        class Reservation extends React.Component {
            constructor(props) {
                super(props);
                this.state = {
                    isGoing: true,
                    numberOfGuests: 2
                };

this.handleInputChange = this.handleInputChange.bind(this);
            }

handleInputChange(event) {
                const target = event.target;
                const value = target.type === 'checkbox' ? target.checked : target.value;
                const name = target.name;

this.setState({
                    [name]: value
                });
            }

render() {
                return (
                    <form>
                        <label>
                            是否离开:
                            <input
                                name="isGoing"
                                type="checkbox"
                                checked={this.state.isGoing}
                                onChange={this.handleInputChange} />
                        </label>
                        <br />
                        <label>
                            访客数:
                            <input
                                name="numberOfGuests"
                                type="number"
                                value={this.state.numberOfGuests}
                                onChange={this.handleInputChange} />
                        </label>
                    </form>
                );
            }
        }
        ReactDOM.render(
            <Reservation />,
            document.getElementById('example')
        );

</script>

</body>

</html>

运行结果