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fix(codemode): align string, array, and Date behavior (#37775)

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Aiden Cline 2026-07-19 21:41:06 -05:00 • committed by GitHub
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packages/codemode/interpreter-support.md
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@ -91,8 +91,8 @@ ultimate source of truth.
like JS.
- [x] Tool references and detached `Promise` statics are rejected as callbacks with a hint to wrap them in an
arrow function.
- [ ] Stop automatically awaiting promise-returning string replacers; match JavaScript's synchronous callback-result
coercion.
- [x] Promise-returning string replacers are coerced synchronously to `"[object Promise]"`, like JavaScript; they are
not automatically awaited.
- [x] The optional `thisArg` of iteration methods is accepted and ignored: CodeMode functions have no `this`, so
ignoring it matches JS arrow-function semantics exactly.
- [ ] `this` in non-arrow CodeMode functions and callbacks.
@ -199,8 +199,8 @@ ultimate source of truth.
- [ ] `Array.prototype.toSpliced`.
- [ ] Canonical array/string index parsing: a key such as `"01"` must remain an ordinary property key rather than
aliasing index `1`.
- [ ] `Array.prototype.sort` and `toSorted` must preserve trailing holes; they currently turn holes into own
`undefined` elements.
- [x] `Array.prototype.sort` preserves trailing holes, while `toSorted` densifies holes into `undefined` elements,
like JavaScript.
## Strings
@ -267,10 +267,9 @@ ultimate source of truth.
- [x] Date values serialize to ISO strings; invalid dates serialize to `null`.
- [ ] Date setters.
- [ ] `Date.prototype.toUTCString` and its `toGMTString` alias.
- [ ] Native one-argument Date coercion; unsupported boolean/object inputs currently become invalid dates instead of
being coerced.
- [x] Native one-argument Date coercion for supported values, including booleans, null, arrays, and plain objects.
- [ ] Native Date loose-equality and default primitive-coercion semantics.
- [ ] Native `RangeError` branding for invalid `toISOString()` calls.
- [x] Native `RangeError` branding for invalid `toISOString()` calls.
## Regular expressions