About

CSSOM defines APIs (including generic parsing and serialization rules) for Media Queries, Selectors, and of course CSS itself.

The CSS bytes are converted into characters, then tokens, then nodes, and finally they are linked into a tree structure known as the “CSS Object Model” (CSSOM).

Articles Related

Documentation / Reference

• Cascading Style Sheets Object Model (CSSOM), S. Pieters, G. Adams. W3C.)
• https://developers.google.com/web/fundamentals/performance/critical-rendering-path/constructing-the-object-model#css_object_model_cssom