The blink element is a non-standard HTML element that indicates to a user agent (generally a web browser) that the page author intends the content of the element to blink (that is, alternate between being visible and invisible). The element was introduced in Netscape Navigator but is no longer supported and often ignored by modern Web browsers; some, such as Internet Explorer, never supported the element at all. Despite its initial popularity among home users in the 1990s, it fell out of favor due to its overuse and the difficulty it presents in reading. Lou Montulli, often credited as the inventor of the blink element, claims he only suggested the idea, without writing any actual code. Usage The blink element is non-standard, and as such there is no authoritative specification of its syntax or semantics. While Bert Bos of the World Wide Web Consortium has produced a Document Type Definition that includes syntax for the blink element (defining it as a phrase element on a par with elements for emphasis and citations), the comments in the DTD explain that it is intended as a joke. Syntax of the blink element type is identical to such standard HTML inline elements as span. For example: . The rate of blinking is browser-specific, and the tag contains no parameters or means to adjust the rate of blinking. In versions of Mozilla Firefox that support the tag, the text alternates between being visible for three quarters of a second and being invisible for one quarter of a second. The blink element type was first invented for Netscape Navigator and was supported in its descendants, such as Mozilla Firefox (except for the Netscape 6 and early Mozilla suite browsers—it is thus also absent from SeaMonkey, which descends from Mozilla suite); it was removed from Firefox in version 23. Microsoft's Internet Explorer and WebKit (the browser engine behind Apple's Safari and Google Chrome) never supported it, even in its CSS incarnation. It was also supported by the Opera Internet Browser, but support ended in version 15 when that browser switched to a WebKit-based engine. Vivaldi, despite its roots as a spiritual successor to the Presto-based Opera, also does not support a functional blink tag. Some software supports the blink element as an easter egg. Google Search blinks parts of the page when one searches for "blink html". Android's user interface framework supports the blink tag, labeling