Speculation Rules API

[Tim Vereecke]

With the new Speculation rules API browsers can prerender pages. This can lead to ad impressions being requested and logged without users navigation to the page (and not seeing ads).

I think it would make sense to delay the logging to be delayed till after the prerenderingchange event to:

• Avoid views never seen
• Avoid reduction of CTR 

eg.

if (document.prerendering) {
      document.addEventListener("prerenderingchange", doSomething, { once: true, });
} else {
     doSomething();
}

Reference:

https://developer.mozilla.org/en-US/docs/Web/API/Speculation_Rules_API