如果react-select中的项长度为1，如何动态添加isFixed？

import React, { useState } from 'react';
import Select from 'react-select';

const options = [
  { value: 'option1', label: 'Option 1' },
  { value: 'option2', label: 'Option 2' },
];

const MySelect = () => {
  const [selectOptions, setSelectOptions] = useState(options);

  const handleInputChange = (newValue) => {
    // Check if options length is 1
    if (newValue.length === 1) {
      // Add isFixed property to the option
      const updatedOptions = newValue.map((option) => ({
        ...option,
        isFixed: true,
      }));
      setSelectOptions(updatedOptions);
    } else {
      setSelectOptions(newValue);
    }
  };

  return (
    <Select
      options={selectOptions}
      isMulti
      onChange={handleInputChange}
    />
  );
};

export default MySelect;