This commit implements the Web IDL USVString conversion, which mandates
all unpaired Unicode surrogates be turned into U+FFFD REPLACEMENT
CHARACTER. It also disallows Symbols to be used as USVString per spec.
Certain functions call into C++ methods in the binding that use the
Utf8Value class to access string arguments. Utf8Value already does the
normalization using V8's String::Write, so in those cases, instead of
doing the full USVString normalization, only a symbol check is done
(`'' + val`, which uses ES's ToString, versus `String()` which has
special provisions for symbols).
PR-URL: https://github.com/nodejs/node/pull/11436
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
- Make URLSearchParams constructor spec-compliant
- Strip leading `?` in URL#search's setter
- Spec-compliant iterable interface
- More precise handling of update steps as mandated by the spec
- Add class strings to URLSearchParams objects and their prototype
- Make sure `this instanceof URLSearchParams` in methods
Also included are relevant tests from W3C's Web Platform Tests
(https://github.com/w3c/web-platform-tests/tree/master/url).
Fixes: https://github.com/nodejs/node/issues/9302
PR-URL: https://github.com/nodejs/node/pull/9484
Reviewed-By: James M Snell <jasnell@gmail.com>
