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This adds the
tag-observer
, which is an abstraction over the observer functionality inbind
, but that can be reused for multiple abilities which would like to query the DOM for some kind of attribute that links back to a controller (e.g. targets, actions).This lays more groundwork for 2.0. The plan in 2.0 is to have
@target
use this same functionality, so that we can observe when target/targets change in a page.