Rendering is a process used in web development that turns website code into the interactive pages users see when they visit a website . The term generally refers to the use of HTML, CSS, and JavaScript codes. The process is completed by a rendering engine, the software used by a web browser to render a web page.
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First, the browser combines the DOM and CSSOM into a “render tree,” which captures all the visible DOM content on the page and all the CSSOM style information for each node . To construct the render tree, the browser roughly does the following: Starting at the root of the DOM tree, traverse each visible node.
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