← back to v133 · animation-overallprogress

conformance · v133

v133 · animation-overallprogress — conformance probe

6 assertions drawn from the spec. Each is a single contract the spec text makes. Pass/fail reflects what this browser executed; blocked means the contract was not run because it needs user mediation, hardware, or another unavailable precondition. Open the page in Chrome stable / canary / Firefox / Safari to compare.

browser: spec: https://drafts.csswg.org/web-animations-2/#the-overall-progress-of-an-animation chromestatus: #5083257285378048 generated 2026-06-01T08:12:59Z by conformance-author-v1-subagent
0
pass
0
fail
0
blocked
6
total
id contract kind verdict detail
animation-prototype-overallprogress Animation.prototype exposes an overallProgress property. spec ↗ script
overallprogress-null-before-active overallProgress is null on a fresh Animation that has not yet entered the active phase. spec ↗ script
overallprogress-numeric-after-running Once an Animation is running over a KeyframeEffect with a finite iteration count, overallProgress returns a number between 0 and 1. spec ↗ script
overallprogress-accounts-for-iterations overallProgress factors in iteration count: halfway through iteration 1 of a 2-iteration animation reports 0.25. spec ↗ script
overallprogress-readonly overallProgress is a read-only attribute; assigning to it has no effect. spec ↗ script
animation-interface-exposed The Animation constructor remains exposed on Window for the API surface. typeof