TableConversionAdditionalSlot

By default, only the tableRow elements from the table model are downcast inside the <table> and all other elements are pushed outside the table. This handler allows creating additional slots inside the table for other elements.

Take this model as an example:

<table>
  <tableRow>...</tableRow>
  <tableRow>...</tableRow>
  <tableColumnGroup>...</tableColumnGroup>
</table>

By default, downcasting result will be:

<table>
  <tbody>
    <tr>...</tr>
    <tr>...</tr>
  </tbody>
</table>
<colgroup>...</colgroup>

To allow the tableColumnGroup element at the end of the table, use the following configuration:

const additionalSlot = {
  filter: element => element.is( 'element', 'tableColumnGroup' ),
  positionOffset: 'end'
}

Now, the downcast result will be:

<table>
  <tbody>
    <tr>...</tr>
    <tr>...</tr>
  </tbody>
  <colgroup>...</colgroup>
</table>