Dimensions Middleware

[agubler]

Enhancement

A middleware for working retrieving the dimensions of a dom node by key. Building on the resize middleware, to prevent unnecessary calls to getBoundingClientRect which causes layout/reflow.

In addition to prevent superfluous calls getBoundingClientRect etc, using resize means that it would cause an invalidation when dimensions change which doesn't happen with the current Dimensions meta.

[agubler]

After some thought, the dimensions middleware shouldn't use the resize middleware as it doesn't detect things like position. If a user is just interested in the node dimensions the resize meta can be used as it returns the content rect