在React js中表单的输入字段中键入铁路超高

import React, { useState } from 'react';

function RailwayInput() {
  const [railwayHeight, setRailwayHeight] = useState('');

  const handleChange = (event) => {
    setRailwayHeight(event.target.value);
  };

  return (
    <div>
      <label htmlFor="railwayHeight">铁路超高:</label>
      <input
        type="text"
        id="railwayHeight"
        value={railwayHeight}
        onChange={handleChange}
      />
      <p>输入的铁路超高: {railwayHeight}</p>
    </div>
  );
}

export default RailwayInput;

<input
  type="text"
  id="railwayHeight"
  value={railwayHeight}
  onChange={handleChange}
/>

const handleChange = (event) => {
  setRailwayHeight(event.target.value);
};