demo · v139

Render Blocking Flag

The blocking attribute gains a full-frame-rate token. Resources marked full-frame-rate hold back the first full-rate frame (not just first paint). Click a scenario to render the timeline.

HTML parse blocking resource fetch first contentful paint first full-frame-rate frame

the html

<link rel="stylesheet" href="hero.css"
      blocking="render full-frame-rate">
<!-- v139: token "full-frame-rate" holds back the first full-rate
     frame, on top of holding back first paint. -->

see also