1. IntersectionObserver V2

    Iteration on the original API that also reports if the element is covered by another element or has filters applied to it. Useful for blocking clickjacking attempts or tracking ad exposure.

  2. htmllinkelement api: blocking

  3. htmlscriptelement api: blocking

  4. htmlstyleelement api: blocking

  5. performancelonganimationframetiming api: blockingduration

  6. performanceresourcetiming api: renderblockingstatus

  7. html element: link: blocking

  8. html element: script: blocking

  9. html element: style: blocking