At least it works for the dA sites (for me). The tags are automatically detected and converted, such as e.g. the (emot)icon shortcuts in the form of ":
xxx:", regardless which graphical browser is in use. – However I remember running into problems when I mixed formatted contents with raw HTML. Hence I’m trying to avoid that. Besides interactively pasting icons into HTML via "Add Media" functions flawlessly of course.
Within other CMSes like WordPress or Typo3 it’s different though: In their editors, you simply must
explicitly select HTML mode.
Yet pre-composing large portions of text externally (in HTML within an editor that knows syntax highlighting) yields other advantages, too. First, it saves you from data loss in case the website is crashing, or closing the dA browser window by mistake! Further, you can check out your drafts in another tab without submitting. – Look at this gallery
for example: The descriptions are all pre-composed and heavily tested.
The only little draw-back with this method is when it comes to post-editing. You’d have to decide whether to do that in the browser or in your editor again for not getting confused with version conflicts and posting old stuff~ But it’s worth the effort!