This link appeared in WDRL 139 on .
Resize Observer
A great step towards Element Queries and better control over modules in our front-ends is coming to browsers now with the new Resize Observer API that observes changes to an element’s size. This, together with the Houdini project, could serve well for a custom Element Query polyfill. No browser supports this yet, but all vendors consider it and see it as a useful addition.