The `width: 44%` comes in because the nested table is 44% of the overall column width.

Browsers then interpret this as 44% of the containing cell, I guess, which is why you get the odd output.

I don't see a good solution here.  The problem is that 44% will be interpreted relative to line length in other formats (e.g. Markdown, LaTeX), so we don't want to change the markdown reader so that it assigns this embedded table a higher relative width.  Nor is it clear how we'd change the HTML writer to interpret this width differently.  I suppose we could keep track of the width of the containing cell and recompute based on that.  You can submit a bug report if you like.

> On Jul 22, 2022, at 1:00 PM, William Lupton <wlupton-QSt+ys/nuMyEUIsrzH9SikB+6BGkLq7r@public.gmane.org> wrote:
>
> All,
>
> [Forked from https://groups.google.com/g/pandoc-discuss/c/5O6iYmUwFJ8/m/biiwj2njAAAJ]
>
> In the above thread I presented the grid.md example shown at the bottom of this message. I also couldn't resist trying another level of nesting, resulting in the grid2.md example shown below. This works, but I'm wondering whether there's a bug (in the HTML writer) relating to how nested grid table widths are calculated:
>       • pandoc -s grid2.md -o grid2.html gives the first image shown below the markdown, in which the nested grid table has a scroll bar
>       • The table and column widths are as shown immediately below and I'm wondering where the width:44% came from. Removing it gives the second image below the markdown (no scroll bar)
> I'm not seriously suggesting actually using a text editor to create deeply nested tables such as these... but given that it works I wanted to understand what was going on with the table width calculation.
>
> Thanks,
> William
>
> % xmllint -format grid2.html | egrep -e '<(\/?table|col )'
>     <table style="width:79%;">
>         <col style="width: 18%"/>
>         <col style="width: 11%"/>
>         <col style="width: 50%"/>
>             <table style="width:44%;">
>                 <col style="width: 18%"/>
>                 <col style="width: 26%"/>
>                     <table>
>                     </table>
>             </table>
>     </table>
>
> grid2.md
>
> +------------+-------+-----------------------------------+
> | Fruit      | Price | Advantages                        |
> +============+=======+===================================+
> | Bananas    | $1.34 | - built-in wrapper                |
> |            |       | - bright color                    |
> +------------+-------+-----------------------------------+
> | Oranges    | $2.10 | - cures scurvy                    |
> |            |       | - tasty                           |
> +------------+-------+-----------------------------------+
> | Apple (pi) | $3.14 | +------------+------------------+ |
> |            |       | | One        | Two              | |
> |            |       | +============+==================+ |
> |            |       | | my         | table            | |
> |            |       | +------------+------------------+ |
> |            |       | | is         | | Three | Four | | |
> |            |       | |            | |-------+------| | |
> |            |       | |            | | very  | nice | | |
> |            |       | +------------+------------------+ |
> +------------+-------+-----------------------------------+
>
> <Screenshot 2022-07-22 at 11.46.56.png>
>
> <Screenshot 2022-07-22 at 11.57.56.png>
>
> grid.md
>
> +---------------+---------------+--------------------+
> | Fruit         | Price         | Advantages         |
> +===============+===============+====================+
> | Bananas       | $1.34         | - built-in wrapper |
> |               |               | - bright color     |
> +---------------+---------------+--------------------+
> | Oranges       | $2.10         | - cures scurvy     |
> |               |               | - tasty            |
> +---------------+---------------+--------------------+
> | Apple (pi)    | $3.14         | | One | Two   |    |
> |               |               | |-----+-------|    |
> |               |               | | my  | table |    |
> |               |               | | is  | nice  |    |
> +---------------+---------------+--------------------+
>
> <Screenshot 2022-07-20 at 23.36.36.png>
>
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