What are DOM levels?

Question

I\'ve heard DOM level 2 and DOM level 3 mentioned in previous posts. Are these abstract constructs like the ISO OSI model which has layers 1-7 but are only loosely followed?

Answer 1

I know this question is old, but I'm adding this data for any people coming across this post.

The DOM used to be written as a set of levels. That is no longer the case.

These days it is maintained as the DOM Living Standard

See also the DOM Reference for more recent web-developer-focused information.

Source: Here