A single page application (SPA) is a web application that runs entirely in the client web browser, typically using a combination of HTML, JavaScript, and CSS. The application modifies the web page's own data structures through its DOM tree, and makes its changes persistent when the user invokes the browser's Save Page command to save the (modified) web page to disk.

Like DHTML, LAMP, or Ajax, SPA is not a technology in itself, but a term that refers to the use of a group of technologies together.

See also

• Rich Internet Application
• Ajax
• DHTML
• JavaScript
• VBScript
• WinLIKE, a full featured Window Manager