27 lines
711 B
Plaintext
27 lines
711 B
Plaintext
js> load('testsrc/doctests/util.js');
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js> Object.isSealed
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function isSealed() { [native code for Object.isSealed, arity=1] }
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js> expectTypeError(function() { Object.isSealed() });
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js> [undefined, null, true, 1, 'hello'].forEach(function(value) {
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> expectTypeError(function() { Object.isSealed(value) })
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> })
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js> Object.isSealed({})
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false
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js> var obj = Object.preventExtensions({});
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js> Object.isSealed(obj);
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true
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js> var obj = Object.defineProperty({}, 'a', {configurable:false});
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js> var _ = Object.preventExtensions(obj);
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js> Object.isSealed(obj);
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true
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js> var obj = Object.defineProperty({}, 'a', {configurable:true});
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js> var _ = Object.preventExtensions(obj);
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js> Object.isSealed(obj);
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false
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