CSS Basic User Interface is a CSS module that lets you define the rendering and functionality of features related to the user interface. Reference Properties appearance box-sizing cursor ime-mode outline outline-width outline-style outline-color outline-offset resize text-overflow user-select nav-down nav-left nav-right nav-up Guides Using URL values for the cursor property Explains how a URL can be used with the cursor property to produce custom cursors. Specifications Specification Status Comment CSS Basic User Interface Module Level 3 Recommendation CSS Level 2 (Revision 1) Recommendation Initial definition. Browser compatibility We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help! Desktop Mobile Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit) Basic support 1.0 1.5 (1.8) 8.0 7.0 1.2 (125) Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile Basic support 1.0 1.0 (1.8) 8.0 6.0 3.1