Twitter announces Hovercards

Today Twitter announced New Profile Preview Feature.
In an announcement, Twitter Spokesperson Jenna Sampson discussed how the new feature works:
“Hovercards are cards which appear when you hover over a username or avatar. The cards display additional information about the person and allow you to interact with them while staying within the context of your page.”
The feature isn’t active for everyone as yet. It will be implemented in phases.

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