如何扩展多张卡以与状态做出反应？

Question

我有一张卡片清单。单击每张卡片后，我希望它们能够展开并提供更多信息。我从服务器获取卡片并绘制它们。为了扩展单张卡而不是多张卡，我创建了一个状态 editIndex，它检查卡的 id，以便它可以正常工作并专门扩展该卡。我不知道如何同时扩展一张卡和另一张卡。因为现在如果我点击卡片，另一张展开的卡片就会折叠起来。

  const [studentList, setStudentList] = useState();
  const [input, setInput] = useState(" ");
  const [editIndex, setEditIndex] = useState(null);
  const [suggestions, setSuggestions] = useState(null);


 const handleExpand = (id) => {
 setEditIndex((e) => (e === id ? null : id))};
 
return (
<div
  className="flex
  flex-col 
  w-4/5
  h-[800px]
  overflow-scroll
  scrollbar-hide
  border 
  bg-white 
  rounded-xl
  "
>
  <div>
    {studentList?.map(
      ({
        city,
        company,
        email,
        firstName,
        grades,
        id,
        lastName,
        pic,
        skill,
      }) => (
        <div
          key={uuidv4()}
          onClick={(e) => handleExpand(id)}
          className="flex  border-b-2 py-2 px-7 xl:px-12 cursor-pointer
            mb-2 max-h-96 transition transform ease duration-200;
            "
        >
          <div className="flex items-center ">
            <img
              src={pic}
              className="flex items-center border rounded-full object-cover w-  [100px] h-[100px]"
            />
          </div>
          <div className="ml-10 superTest ">
            <p className="font-bold text-4xl">
              {firstName} {lastName}
            </p>
            <p>E-mail: {email}</p>
            <p>Company: {company}</p>
            <p>Skill: {skill}</p>
            <p>Average: {grades}% </p>

            {editIndex === id && (
              <div>
                <p>1</p>
                <p>2</p>
                <p>3</p>
                <p>4</p>
                <p>5</p>
              </div>
            )}
          </div>
        </div>
      )
    )}
  </div>
</div>
  );
    }

 export default Card;

Answer 1

取而代之的editIndex是扩展卡的值Set：id

const [editing, setEditing] = useState(new Set());

然后，扩展/收缩一张卡（遗憾的是，Set没有内置toggle方法）：

const handleExpand = (id) => {
    setEditing(editing => {
        // Copy the set
        editing = new Set(editing);
        if (editing.has(id)) {
            // Already editing, stop editing
            editing.delete(id);
        } else {
            // Not editing, start
            editing.add(id);
        }
        return editing;
    });
};

要确定卡是否已扩展，请执行以下操作editing.has(id)：

{editing.has(id) && (
  <div>
    <p>1</p>
    <p>2</p>
    <p>3</p>
    <p>4</p>
    <p>5</p>
  </div>
)}