Add option to omit content output

[alxmagro]

I was trying to use markdown-it-container for get block content and render myself with some transformations, and I could append it to "opening tag" return, but the content is still rendering on output.

Aside "validate", "render" and "marker", it could have option to omit output (eg.: "output: false").

It give more options to dev, to do thigs like I described above.

[alkaitagi]

Yes, it'd be ready helpful. In my project I wrap a container around a table, then on container rendering I parse the table's data and pass it into a custom Vue component. Since I no longer need the original table I've ended up just wrapping the content in <!-- comments.

[KaelWD]

You can iterate tokens until you find one with type: 'container_<name>_close' and remove all tokens between that and the open one.

[puzrin]

This does not look like intended use

1. You probably need custom fenced block instead, for raw content access
2. Or you can call .parse manually, then update tokens as needed, then call render.