demo · v143

Mobile Eager Tuning

The page injects a real <script type="speculationrules"> with the eagerness you pick, then watches when target links enter the viewport. v143 mobile fires eager sooner when a link sits visible for a moment — the log records what your browser actually decides to prefetch / prerender.

capability probes

configure

scrollable viewport — let a link rest in view

scroll down…
/v143/ — release index /features
keep scrolling…
/ — home /v148/
…and a bit more
/v149/

event log

the call

<script type="speculationrules">
{
  "prerender": [{
    "where": { "selector_matches": "[data-target]" },
    "eagerness": "eager"
  }]
}
</script>

see also