guardian/frontend — pull request #6203 by Jholder112233 (2014-09-30 15:24:42+00:00)
Title: Only enhance tweets when they approach the viewport

Modified the logic for enhancing tweets on live blog and article pages so that they only load in when they are approaching the viewport.

This fixes the lag encountered when you 'view all updates' on a live blog with a lot of embedded tweets.

// @mattosborn