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Configuration error
Configuration error
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var hasPropertyDescriptors = require('has-property-descriptors'); | |
var GetIntrinsic = require('get-intrinsic'); | |
var $defineProperty = hasPropertyDescriptors() && GetIntrinsic('%Object.defineProperty%', true); | |
var hasArrayLengthDefineBug = hasPropertyDescriptors.hasArrayLengthDefineBug(); | |
// eslint-disable-next-line global-require | |
var isArray = hasArrayLengthDefineBug && require('../helpers/IsArray'); | |
var callBound = require('call-bind/callBound'); | |
var $isEnumerable = callBound('Object.prototype.propertyIsEnumerable'); | |
// eslint-disable-next-line max-params | |
module.exports = function DefineOwnProperty(IsDataDescriptor, SameValue, FromPropertyDescriptor, O, P, desc) { | |
if (!$defineProperty) { | |
if (!IsDataDescriptor(desc)) { | |
// ES3 does not support getters/setters | |
return false; | |
} | |
if (!desc['[[Configurable]]'] || !desc['[[Writable]]']) { | |
return false; | |
} | |
// fallback for ES3 | |
if (P in O && $isEnumerable(O, P) !== !!desc['[[Enumerable]]']) { | |
// a non-enumerable existing property | |
return false; | |
} | |
// property does not exist at all, or exists but is enumerable | |
var V = desc['[[Value]]']; | |
// eslint-disable-next-line no-param-reassign | |
O[P] = V; // will use [[Define]] | |
return SameValue(O[P], V); | |
} | |
if ( | |
hasArrayLengthDefineBug | |
&& P === 'length' | |
&& '[[Value]]' in desc | |
&& isArray(O) | |
&& O.length !== desc['[[Value]]'] | |
) { | |
// eslint-disable-next-line no-param-reassign | |
O.length = desc['[[Value]]']; | |
return O.length === desc['[[Value]]']; | |
} | |
$defineProperty(O, P, FromPropertyDescriptor(desc)); | |
return true; | |
}; | |