feat: customize rendering links

[pi0]

Some tags like <a> are simply rendered as <a href. For customizing theming, it is often common to need to add some classes. Also sometimes adding target and rel to links (to make them external)

I undrestand having dynamic callback fn might imply performance and complexity, but would it possible to have simple option to customize default templates in zig code?

[ije]

i think we can add two flags for this:

LINK_REL_EXTERNAL // rel="external"
LINK_TARGET_BLANK // target="_blank"

what do you think?

[pi0]

That would be nice! Also, perhaps the ability to set the default class or artibrary attrs string? (for styles, it is possible to use a wrapper class like .md a but when using md4w to embed partial renders, it becomes more tricky.

[ije]

it's a bit complex to pass string to wasm, the flags option is just a number no memory alloc needed