React原生创建文本字段，预定义格式为dd/mm/yyyy

import React from 'react';

class DateInput extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      value: '',
    };
  }

  handleChange = (e) => {
    // 验证输入是否符合预定义格式
    const regex = /^([0-9]{2})\/([0-9]{2})\/([0-9]{4})$/;
    const isValidFormat = regex.test(e.target.value);
    
    if (isValidFormat) {
      this.setState({ value: e.target.value });
    }
  }

  render() {
    return (
      <input
        type="text"
        value={this.state.value}
        onChange={this.handleChange}
      />
    );
  }
}

export default DateInput;