代码：html的空行设置背景

import React from 'react';

export default function EmptyRow(props) {

  let arr = [];
  for (let i = 0; i < props.length; i ++) {
    arr.push(i);
  }

  return (
    <tr className="emptyRow">
      {
        arr.map(() => {
          return <td></td>
        })
      }
    </tr>
  )
}