Is there a way to add a default class?

[antgel]

Hi, I took the liberty of not using the issue template because this seems to be a feature scope question, hope that's okay.

I'm using an 11ty theme that incorporates Bootstrap, hence I'd like some tags to include default classes e.g. <blockquote class="blockquote">. Is there a way to do this with this plugin?

I tried to do it with markdown-it but didn't get very far: markdown-it/markdown-it#117 (comment)