# CSSOM The Custom Style Sheet Object Model - CSSOM - is tree structure consisting of nodes representing the [CSS](/glossary/c/css) styling for an (X)HTML or XML document. It is used to create the styling for a document, typically by a web browser. Each node is an object that can be accessed separately and manipulated to change the visual representation. The CSSOM is used together with the [DOM](/glossary/d/dom) to display web pages.