Tweet button

 Tweet button  is a Twitter-specific "post" webaction.

Why
If you POSSE to Twitter, you may want to also provide a "Tweet" button as a fallback to a "post" webaction on those posts syndicated to Twitter.

How
See https://dev.twitter.com/web/tweet-button

History

 * 2015-11-20 Twitter changed the look of Tweet buttons: A new design for Tweet and follow buttons"[…] the Tweet and follow buttons will switch to a modern, high-contrast design of white text on a dark blue background. This visual refresh updates our button design from 2011." and removed share counts from Tweet buttons: Clarification about share counts for the new Tweet button"We're removing share counts from the new Tweet button. The related JSON response will be shut down."
 * js;dr blog post supposedly has more details: https://blog.twitter.com/developer/en_us/a/2015/hard-decisions-for-a-sustainable-platform.html
 * 2011 js;dr blog post about Tweet buttons: https://blog.twitter.com/developer/en_us/a/2011/tweet-and-follow-button-refresh.html