引导表格悬停在rowspan上，以突出显示该单元格所属的所有行

问题描述

我正在尝试在具有多个table-hover值的Bootstrap表上实现rowspan类的效果。这意味着我要突出显示同一行中的每个单元格。以下是当前table-hover行为的摘要：

.td-centered {
  vertical-align: middle!important;
  text-align: center;
}

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" rel="stylesheet" />
<table class="table text-center text-nowrap table-bordered table-hover">
  <thead>
    <tr>
      <th scope="col" class="h5 font-weight-bold">
        Date
      </th>
      <th scope="col" class="h5 font-weight-bold">
        Title
      </th>
      <th scope="col" class="h5 font-weight-bold">
        Amount
      </th>
      <th scope="col" class="h5 font-weight-bold">
        Price
      </th>
      <th scope="col" class="h5 font-weight-bold">
        Value
      </th>
      <th scope="col" class="h5 font-weight-bold">
        Category
      </th>
      <th scope="col" class="h5 font-weight-bold">
        Mean
      </th>
    </tr>
  </thead>

  <tbody>
    <tr>
      <th scope="row" class="td-centered" rowspan="3">2020-06-25</th>
      <td class="td-centered" rowspan="2">Some name 1</td>
      <td class="td-centered">2</td>
      <td class="td-centered">30.00 PLN</td>
      <td class="td-centered">60.00 PLN</td>
      <td class="td-centered" rowspan="3">Own</td>
      <td class="td-centered">Cash</td>
    </tr>
    <tr>
      <td class="td-centered">1</td>
      <td class="td-centered" rowspan="2">20.00 PLN</td>
      <td class="td-centered">20.00 PLN</td>
      <td class="td-centered">Bank Account</td>
    </tr>
    <tr>
      <td class="td-centered">Some name 2</td>
      <td class="td-centered">2</td>
      <td class="td-centered">40.00 PLN</td>
      <td class="td-centered">PayPal</td>
    </tr>
  </tbody>
</table>

预期的行为如下所示：

.td-centered {
  text-align: center;
  vertical-align: middle !important;
}

.red-bg {
  background-color: red;
}

<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.min.css" rel="stylesheet" />
<table class="table text-center text-nowrap table-bordered">
  <thead>
    <tr>
      <th scope="col" class="h5 font-weight-bold">
        Date
      </th>
      <th scope="col" class="h5 font-weight-bold">
        Title
      </th>
      <th scope="col" class="h5 font-weight-bold">
        Amount
      </th>
      <th scope="col" class="h5 font-weight-bold">
        Price
      </th>
      <th scope="col" class="h5 font-weight-bold">
        Value
      </th>
      <th scope="col" class="h5 font-weight-bold">
        Category
      </th>
      <th scope="col" class="h5 font-weight-bold">
        Mean
      </th>
    </tr>
  </thead>

  <tbody>
    <tr>
      <td scope="row" class="td-centered red-bg" rowspan="3"><b>Hover here</b></td>
      <td class="td-centered red-bg" rowspan="2">Some name 1</td>
      <td class="td-centered red-bg">2</td>
      <td class="td-centered red-bg">2</td>
      <td class="td-centered red-bg">4</td>
      <td class="td-centered red-bg" rowspan="3">X</td>
      <td class="td-centered red-bg">Y</td>
    </tr>
    <tr>
      <td class="td-centered red-bg">1</td>
      <td class="td-centered red-bg" rowspan="2">1</td>
      <td class="td-centered red-bg">1</td>
      <td class="td-centered red-bg">Z</td>
    </tr>
    <tr>
      <td class="td-centered red-bg">Some name 2</td>
      <td class="td-centered red-bg">2</td>
      <td class="td-centered red-bg">2</td>
      <td class="td-centered red-bg">A</td>
    </tr>

    <tr>
      <td></td>
    </tr>

    <tr>
      <td scope="row" class="td-centered red-bg" rowspan="3">Some date</td>
      <td class="td-centered red-bg" rowspan="2"><b>Hover here</b></td>
      <td class="td-centered red-bg">2</td>
      <td class="td-centered red-bg">2</td>
      <td class="td-centered red-bg">4</td>
      <td class="td-centered red-bg" rowspan="3">X</td>
      <td class="td-centered red-bg">Y</td>
    </tr>
    <tr>
      <td class="td-centered red-bg">1</td>
      <td class="td-centered red-bg" rowspan="2">1</td>
      <td class="td-centered red-bg">1</td>
      <td class="td-centered red-bg">Z</td>
    </tr>
    <tr>
      <td class="td-centered">Some name 2</td>
      <td class="td-centered">2</td>
      <td class="td-centered">2</td>
      <td class="td-centered">A</td>
    </tr>

    <tr>
      <td></td>
    </tr>

    <tr>
      <td scope="row" class="td-centered red-bg" rowspan="3">Some date</td>
      <td class="td-centered red-bg" rowspan="2">Some name 1</td>
      <td class="td-centered red-bg"><b>Hover here</b></td>
      <td class="td-centered red-bg">2</td>
      <td class="td-centered red-bg">4</td>
      <td class="td-centered red-bg" rowspan="3">X</td>
      <td class="td-centered red-bg">Y</td>
    </tr>
    <tr>
      <td class="td-centered">1</td>
      <td class="td-centered" rowspan="2">1</td>
      <td class="td-centered">1</td>
      <td class="td-centered">Z</td>
    </tr>
    <tr>
      <td class="td-centered">Some name 2</td>
      <td class="td-centered">2</td>
      <td class="td-centered">2</td>
      <td class="td-centered">A</td>
    </tr>
  </tbody>
</table>

我可以使用jQuery来解决这个问题。这个问题的最佳解决方案是仅使用引导程序，但是我也可以使用普通的CSS。如果您能帮助我，那太好了：）

解决方法

我想出了以下解决方案：

jQuery(() => {
  if ($("#table-multi-hover").length) {
    const headerValues = Array.from($("thead")[0].children[0].children)
      .map(item => item.innerText.toLowerCase());

    let table = [];

    const tableCells = Array.from($("tbody")[0].children)
      .map(item => item.children)
      .map(item => Array.from(item));

    for (let i = 0; i < tableCells.length; i++) {
      let tempObj = {};
      for (let j = 0; j < tableCells[i].length; j++) {
        tempObj[tableCells[i][j].attributes.rep.value] = tableCells[i][j];
      }

      for (let j = 0; j < headerValues.length; j++) {
        if (i != 0 && tempObj[headerValues[j]] == undefined) {
          tempObj[headerValues[j]] = table[i - 1][headerValues[j]];
        }
      }
      table.push(Object.assign({},tempObj));
    }

    $("tbody td,tbody th").on("mouseover",event => {
      const rowIndex = parseInt(event.currentTarget.parentElement.attributes.i.value);
      const rep = event.currentTarget.attributes.rep.value;
      const rowspan = event.currentTarget.attributes.rowspan != undefined ?
        parseInt(event.currentTarget.attributes.rowspan.value) : 1;

      for (let i = 0; i < rowspan; i++) {
        for (let j in table[rowIndex + i]) {
          $(table[rowIndex + i][j]).addClass("red-bg");
        }
      }
    });

    $("tbody td,tbody th").on('mouseleave',event => {
      const rowIndex = parseInt(event.currentTarget.parentElement.attributes.i.value);
      const rep = event.currentTarget.attributes.rep.value;
      const rowspan = event.currentTarget.attributes.rowspan != undefined ?
        parseInt(event.currentTarget.attributes.rowspan.value) : 1;

      for (let i = 0; i < rowspan; i++) {
        for (let j in table[rowIndex + i]) {
          $(table[rowIndex + i][j]).removeClass("red-bg");
        }
      }
    });
  }
});

td,th {
  text-align: center;
  vertical-align: middle !important;
}

.red-bg {
  background-color: red;
}

<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table class="table text-center text-nowrap table-bordered" id="table-multi-hover">
  <thead>
    <tr>
      <th scope="col" class="h5 font-weight-bold">
        Date
      </th>
      <th scope="col" class="h5 font-weight-bold">
        Title
      </th>
      <th scope="col" class="h5 font-weight-bold">
        Amount
      </th>
      <th scope="col" class="h5 font-weight-bold">
        Price
      </th>
      <th scope="col" class="h5 font-weight-bold">
        Value
      </th>
    </tr>
  </thead>

  <tbody>
    <tr i="0">
      <th rowspan="3" scope="row" rep="date">2020-06-25</th>
      <td rowspan="2" rep="title">Some name 1</td>
      <td rep="amount">2</td>
      <td rep="price">30.00 PLN</td>
      <td rep="value">60.00 PLN</td>
    </tr>
    <tr i="1">
      <td rep="amount">1</td>
      <td rowspan="2" rep="price">20.00 PLN</td>
      <td rep="value">20.00 PLN</td>
    </tr>
    <tr i="2">
      <td rep="title">Some name 2</td>
      <td rep="amount">2</td>
      <td rep="value">40.00 PLN</td>
    </tr>
    <tr i="3">
      <th rowspan="3" scope="row" rep="date">2020-06-24</th>
      <td rowspan="2" rep="title">Some name 1</td>
      <td rep="amount">2</td>
      <td rep="price">30.00 PLN</td>
      <td rep="value">60.00 PLN</td>
    </tr>
    <tr i="4">
      <td rep="amount">1</td>
      <td rowspan="2" rep="price">20.00 PLN</td>
      <td rep="value">20.00 PLN</td>
    </tr>
    <tr i="5">
      <td rep="title">Some name 2</td>
      <td rep="amount">2</td>
      <td rep="value">40.00 PLN</td>
    </tr>
  </tbody>
</table>

基本上，您需要做的是：

1. 将id属性添加到表中，并将其设置为table-multi-hover。
2. 将i属性添加到tr内的tbody并将其设置为从0开始的行的索引。
3. 将rep属性添加到td和th中，并使用与小写的表头中的值相对应的值。

请注意，我已制定此解决方案以适合我的问题，这意味着我假设表中没有孔，并且不会设置任何colspan属性。我还假定该表将具有一个thead，就像代码片段中那样。添加到元素的类称为red-bg。