mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-23 06:10:02 +08:00
Chris Tate
f8906d0b75
* Support primitive and function property descriptors * Dispatch literal bracket calls to native class methods * Handle numeric class method keys in bracket calls * Call function values returned by class accessors * Expand native object and array semantics * Keep new corpus fixtures aligned with compiler gates * Lower Object.isFrozen arguments once
51 lines
2.8 KiB
JavaScript
51 lines
2.8 KiB
JavaScript
const target = JSON.parse('{"visible":1}');
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Object.defineProperty(target, 'hidden', { value: 2, writable: true, configurable: true });
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console.log(Object.keys(target).join(','));
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const absent = JSON.parse('null');
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try { Object.prototype.propertyIsEnumerable.call(absent, 'x'); }
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catch (error) { console.log(error.name); }
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console.log(Object.getOwnPropertyNames(target).join(','));
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console.log(target.hidden, Object.hasOwn(target, 'hidden'), target.propertyIsEnumerable('hidden'));
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const first = Object.getOwnPropertyDescriptor(target, 'hidden');
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console.log(first.value, first.writable, first.enumerable, first.configurable);
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Object.defineProperty(target, 'hidden', { value: 3, enumerable: true });
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const second = Object.getOwnPropertyDescriptor(target, 'hidden');
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console.log(second.value, second.writable, second.enumerable, second.configurable);
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console.log(Object.keys(target).join(','), Object.values(target).join(','));
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const parent = JSON.parse('{"inherited":4}');
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const child = Object.create(parent);
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const omittedDescriptors = Object.create(parent, undefined);
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console.log(omittedDescriptors.inherited, Object.getOwnPropertyNames(omittedDescriptors).length);
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Object.defineProperty(child, 'own', { value: 5, enumerable: true, writable: true, configurable: true });
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console.log(Object.keys(child).join(','), Object.getOwnPropertyNames(child).join(','));
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console.log(Object.hasOwn(child, 'inherited'), 'inherited' in child);
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const inherited = Object.getOwnPropertyDescriptor(child, 'inherited');
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console.log(inherited === undefined, child.inherited, Object.getPrototypeOf(child) === parent);
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const visited = [];
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for (const key in child) visited.push(key);
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console.log(visited.join(','));
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Object.defineProperty(child, 'inherited', { value: 6, enumerable: false, writable: true });
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const shadowed = [];
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for (const key in child) shadowed.push(key);
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console.log(child.inherited, parent.inherited, shadowed.join(','));
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const fixed = JSON.parse('{"item":7}');
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Object.freeze(fixed);
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const frozen = Object.getOwnPropertyDescriptors(fixed);
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console.log(frozen.item.value, frozen.item.writable, frozen.item.configurable);
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console.log(Object.isExtensible(fixed), Object.isSealed(fixed), Object.isFrozen(fixed));
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try { Object.defineProperty(fixed, 'item', { value: 8 }); }
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catch (error) { console.log(error.name); }
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try { Object.defineProperty(fixed, 'new', { value: 9 }); }
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catch (error) { console.log(error.name); }
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console.log(fixed.item, Object.hasOwn(fixed, 'new'));
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const nullProto = Object.create(null);
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nullProto.key = 10;
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console.log(Object.getPrototypeOf(nullProto) === null, Object.keys(nullProto).join(','));
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Object.preventExtensions(nullProto);
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console.log(Object.isExtensible(nullProto), Object.isSealed(nullProto), Object.isFrozen(nullProto));
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Object.seal(nullProto);
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console.log(Object.isSealed(nullProto), Object.isFrozen(nullProto));
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