Feature request: utility to get position of slot element on page

[patmmccann]

https://github.com/prebid/Prebid.js/blob/af742ce3357dbb6c4d2b498a9462a3936c4db09b/modules/undertoneBidAdapter.js#L57 is a very expensive operation

Source: https://gist.github.com/paulirish/5d52fb081b3570c81e3a

I propose we add a linting rule to disallow. Undertone team, is this calculation important to you? Is there anotherv way to get it?

[dgirardi]

• Update percentInView to de-dupe multiple calls within an auction
• refactor adapters to use it
• add a linter rule to prevent use of getBoundingRect*