The answer
The DOM is the document object model built from HTML. It represents page structure as nodes that scripts can read and change.
Browser DOM, CSSOM, and Render Tree Explained
What is the DOM in a browser?
More FAQs in Browser DOM, CSSOM, and Render Tree Explained
The CSSOM is the browser's model of parsed CSS rules and computed styles used to determine how the page should look.
The render tree combines DOM and CSSOM information into the visible objects the browser can lay out and paint.
No. Nodes that are not visible, such as `display: none` elements, are excluded from the render tree.
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