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conformance · v142

v142 · compression-dictionary-ttl — conformance probe

7 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://github.com/httpwg/http-extensions/issues/2649 chromestatus: #6408307086589952 generated 2026-06-05T10:29:12Z by codex-showcase-auto-research
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id contract kind verdict detail
use-as-dictionary-ttl-zero-token Use-As-Dictionary can carry an explicit ttl=0 parameter. spec ↗ script
ttl-zero-immediately-expires ttl=0 makes a dictionary ineligible for subsequent requests even when no time has elapsed. spec ↗ script
ttl-shorter-than-cache-control An explicit ttl can expire dictionary usefulness before the HTTP cache max-age expires. spec ↗ script
ttl-outlives-cache-control An explicit ttl can keep dictionary usefulness separate from the resource's HTTP cache lifetime. spec ↗ script
omitted-ttl-follows-cache-lifetime When ttl is omitted, the fallback model follows the HTTP cache lifetime. spec ↗ script
available-dictionary-only-when-fresh The Available-Dictionary request header is only modeled when the selected dictionary lifetime is fresh. spec ↗ script
dcb-dcz-content-codings-preserved Headers can preserve the dcb and dcz content-coding tokens used when a fresh dictionary is available. spec ↗ script