Early on in the development of the CSS animation it had drawn concern from those who prefer animation via
JavaScript or, to a lesser-used extent,
Synchronized Multimedia Integration Language (SMIL); others have claimed that it is a move by
Apple Inc., the main sponsor of the WebKit project, to sidestep the inclusion of
Adobe Flash (and the incumbent
Flash animations) on the company's
iOS line of mobile devices which use
Safari. Furthermore, although Cascading Style Sheets is a relatively easy to use programming language, many programmers still struggle with making animations. With this problem, several individuals and websites have developed and created open source CSS button animations with code for users to copy. However, even with these previous controversies, CSS animations can be predominantly found and widely used across the internet. == See also ==