Yes, for almost all projects I work on due to the plugin ecosystem. If size is a concern I will look at zepto, a smaller 80/20 implementation of the jQuery API.

Yes, for almost all projects I work on due to the plugin ecosystem. If size is a concern I will look at zepto, a smaller 80/20 implementation of the jQuery API. And I almost always use intercooler.js to keep my js footprint small.