To prevent unintended clicks/taps, quietly discard input events that target cross-origin iframes that have recently resized or moved a non-trivial distance within the embedding page's viewport. The shipped version limits the intervention to cross-origin iframes that are using the V2 feature set of IntersectionObserver (


The motivation is perhaps best conveyed by this hilarious video: We would like to prevent untrustworthy embedders from using visual bait-and-switch tactics to induce users to click or tap on a third-party iframe.



Specification link

Proposal in a personal repository, no adoption from community

Status in Chromium


Enabled by default (tracking bug)

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

  • No signal
  • No signal
  • No signals


Last updated on 2021-12-13