fix(intl): delegate Date locale formatting to V8 - #467

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ldm0 wants to merge 4 commits into

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wpt/date-locale-formatting

ldm0 commented Sep 9, 2026

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Extract an independently mergeable topic from wpt-misc-fix at a70a96f.

Source commits:

2a90c97

Validation:

cargo fmt --all
cargo clippy --workspace --all-targets --all-features -- -D warnings
cargo nextest run --no-fail-fast

github-actions Bot commented Sep 9, 2026 •

edited

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github-actions Bot commented Sep 9, 2026 •

edited

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github-actions Bot commented Sep 9, 2026 •

edited

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ldm0 marked this pull request as draft

September 10, 2026 09:53

ldm0 marked this pull request as ready for review

September 10, 2026 16:33

ldm0 added 4 commits

September 11, 2026 02:11


          fix(intl): delegate Date locale formatting to V8

d35a0bc

Extract an independently mergeable topic from wpt-misc-fix at
a70a96f.

Source commits:
- 2a90c97

Validation:
- cargo fmt --all
- cargo clippy --workspace --all-targets --all-features -- -D warnings
- cargo nextest run --no-fail-fast


          test(intl): compare Date locale output against native Intl

123763b


          fix(intl): keep Date and Intl native under emulation overrides

8bbdea4

Apply locale and time zone defaults to the page V8 isolate, keeping the other
setting and explicit JavaScript arguments intact. Preserve native Date and
Intl methods, including getter errors and existing formatter settings.

Requires the companion rusty_v8 source change 0cdf2be96d90ce6691eb5ae7cf1f993b0129625e
and its matching native archive and generated Rust bindings. Those artifacts
have been built and verified locally; distribution is still pending.

Validation with the matching native archive: cargo fmt --all; cargo clippy
--workspace --all-targets --all-features -- -D warnings; cargo nextest run
--no-fail-fast (17,260 passed, 13 skipped); CLI build; real CDP probes under
a German/Berlin host across five override states, page navigation, and
a second page retaining host defaults.


          fix(emulation): reject invalid Intl overrides before saving defaults

77e8a33

ldm0 force-pushed the wpt/date-locale-formatting branch from b695c25 to 77e8a33 Compare

September 10, 2026 18:39

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