react props 简写

geekymv 发表于:2024-08-19 22:59:33 阅读数:405

<div id="test"></div>
        <div id="test2"></div>

        <script src="https://unpkg.com/react@16/umd/react.development.js"></script>
        <script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
        <!-- 引入 rop-types.js 用于对属性标签属性进行限制 -->
        <script src="https://unpkg.com/[email protected]/prop-types.js"></script>

        <!-- 引入 babel, 用于将 jsx 转为 js -->
        <!-- Don't use this in production: -->
        <script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>

        <!-- 此处一定要写 babel -->
        <script type="text/babel">
            class Person extends React.Component {

                /* 对 props 进行限制 */
                static propTypes = {
                    name: PropTypes.string.isRequired,
                    age: PropTypes.number,
                    sex: PropTypes.string,

                }
                /* 设置默认值 */
                static defaultProps = {
                    sex: '未知',
                    age: 18
                }

                render() {
                    // props 是只读的
                    // this.props.age = 20

                    return (
                        <ul>
                            <li>姓名:{this.props.name}</li>
                            <li>年龄:{this.props.age}</li>
                            <li>性别:{this.props.sex}</li>
                        </ul>
                    )
                }
            }

            

            

            const p = {name:"jack", age:18}

            ReactDOM.render(<Person name="tony" age={20} sex="男"/>, document.getElementById('test'))

            /* 批量传递 props */
            ReactDOM.render(<Person {...p}/>, document.getElementById('test2'))

        </script>

Barbara Middleton
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Sean Brown
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Kayli Eunice
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