FA-53822 / Accessibility interaction semantics / Member archive

Accessible line break tokens disappear from text · case 02

Accessible line break tokens disappear from text.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

Input [tokens,alt_mode] where tokens are [kind,text,exposed], kinds text, object, break, decoration. Ignore unexposed or decoration tokens. Text is copied exactly; break becomes LF; object becomes U+FFFC unless alt_mode, when nonempty alternative text is used and empty alternative falls back to U+FFFC. Return [flattened,objects] with objects [token_index,start,end,alternative]. All offsets are codepoints in output; ordinary text does not add object mappings. Adjacent objects remain separate; zero-length text has no effect.

Why this case matters

Offline accessibility bridge model with explicit policy; useful for testing semantic API adapters independently of browser implementations.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
contract fixture 4	`["AB", []]`	`["A\nB", []]`	Failed

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