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Implement user-facing Object enumeration and prototype methods that were missing from the JS engine: for...in inherited property enumeration, Object.keys/values/entries/create/getPrototypeOf/assign static methods, hasOwnProperty/propertyIsEnumerable instance methods, and non-enumerable property support to prevent builtin methods from leaking into enumeration. Key changes: - Add non_enumerable_keys HashSet to JsObjectData with mark/query methods - Fix for...in to walk prototype chain (all_enumerable_keys) - Mark all builtin prototype methods non-enumerable (Object, Number, String, Boolean, Error, class prototypes) - Add Object.prototype fallback for Function dispatch - 26 new unit tests, 8 new JS262 conformance tests - Test262 pass rate: 385/550 (70%, up from 47.8%) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
7 lines
218 B
JavaScript
7 lines
218 B
JavaScript
var obj = { a: 1 };
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console.log(obj.propertyIsEnumerable("a"));
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var proto = { x: 1 };
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var child = Object.create(proto);
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console.log(child.propertyIsEnumerable("x"));
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console.log(child.propertyIsEnumerable("missing"));
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