Improved support of TABLE

[guyplusplus]

• migrated to node v5
• upgraded inclusion of turndown npm package to 7.0.0
• support tables with caption and colgroup elements
• support conversion of a multi-lines cell to a single line cell
• support pipe character | escape in a table cell
• fix support for tables with no row
• support for colspan
• nested table inside a table render as is, gfm is not applied
• added more test cases accordingly

[ct1735x]

Thank you so much! These changes really helped me a lot!!

[guyplusplus]

NPM package created until pull request is approved (and maintained)
https://www.npmjs.com/package/@guyplusplus/turndown-plugin-gfm

[alexanderadam]

NPM package created until pull request is approved (and maintained)
https://www.npmjs.com/package/@guyplusplus/turndown-plugin-gfm

That's great.
Maybe you can also point this PR to the other maintained fork?
I'm sure that @laurent22 would be more than happy to accept your PR (and maybe even some maintenance help).

This way, users won't be struggling which fork should be used.

[laurent22]

In fact we now publish two packages, which are used by the Joplin apps, but are generic enough that they should work in any environment:

https://www.npmjs.com/package/@joplin/turndown

https://www.npmjs.com/package/@joplin/turndown-plugin-gfm

Code is still MIT, and available there:

https://github.com/laurent22/joplin/tree/dev/packages/turndown

https://github.com/laurent22/joplin/tree/dev/packages/turndown-plugin-gfm

[guyplusplus]

Sounds a good plan, especially after the dependencies to Joplin in the package have been removed couple weeks ago (reason why I did create my own fork).

Just couple things:

• right now the package is a directory part of a bigger project, better split so that the npm package / repo can have its own life
• this package shall follow closely the turndown new releases

I plan to add the following new features, to be discussed if makes sense and on the details:

• support rowspan to generate a pure MD table (with empty cells)
• add a new output option for "No HTML" so that HTML is not included nor generated in the output. In particular for tables where gfm is quite limited. Joplin can opt-out. When enabling it, it would mean no
  nor HTML nested table, which would be replaced as an ugly long line...

@laurent22 what do you think?

[laurent22]

For information, our Turndown plugins are now part of the official Joplin repository:

https://github.com/laurent22/joplin/tree/dev/packages/turndown

https://github.com/laurent22/joplin/tree/dev/packages/turndown-plugin-gfm

They are both still maintained and under the same MIT license. We accept pull requests.