<ul data-eligibleForWebStory="false"><li>Small DOM mutations can trigger reflow or repaint in the browser.</li><li>Browsers parse HTML by tokenizing and constructing the DOM, followed by creating the CSSOM.</li><li>CSS blocks HTML parsing and JavaScript, while JavaScript can manipulate the DOM.</li><li>The browser constructs the Render Tree by combining the DOM and CSSOM, leading to the painting and compositing phase before displaying on the screen.</li></ul>

How Browsers Parse and Render HTML: From Request to Paint

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