Some of the CSS properties that affect the layout are: It does that by looking at the viewport size and the computed styles. In the layout phase, the browser calculates how much space each box is going to take and where to place it. The layout tree also includes pseudo elements that are added to CSS (these are not present in the DOM). Large paragraphs of text-a single DOM element-are represented as multiple boxes in the layout tree. Layout tree elements don’t map directly to the visible DOM elements. Examples of things that the layout tree doesn’t include are: The DOM contains all of the HTML nodes, but only the visible elements become part of the layout tree. ![]() ![]() The layout tree is based on the DOM, but it’s usually shaped a bit different. Elements in the layout tree are represented as vector boxes. ![]() ![]() In order to that, it makes another tree - the layout tree. Once the browser knows which styles apply to each element, comes the layout phase where the browser figures out the dimensions and positions of all the elements it needs to display on the page.
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