What is a web browser and how does it render pages?

A web browser is a software application designed to access, display, and interact with information on the World Wide Web. To render a page, it initiates by sending an HTTP request to fetch resources such as HTML, CSS, JavaScript, and images from a server. Upon receiving the HTML, the browser parses it to construct the Document Object Model (DOM) tree, while simultaneously parsing CSS to create the CSS Object Model (CSSOM) tree. These two trees are then merged to form the render tree, which represents the visual structure of the page. Subsequently, the browser performs a layout (or reflow) phase to calculate the exact position and size of each element, followed by the painting process, where pixels are drawn onto the screen to visually present the webpage to the user. More details: https://turbocom.com.ua