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25 lines
955 B
JavaScript
25 lines
955 B
JavaScript
'use strict';
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var $ = require('../internals/export');
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var toObject = require('../internals/to-object');
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var toPrimitive = require('../internals/to-primitive');
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var toISOString = require('../internals/date-to-iso-string');
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var classof = require('../internals/classof-raw');
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var fails = require('../internals/fails');
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var FORCED = fails(function () {
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return new Date(NaN).toJSON() !== null
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|| Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;
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});
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// `Date.prototype.toJSON` method
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// https://tc39.es/ecma262/#sec-date.prototype.tojson
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$({ target: 'Date', proto: true, forced: FORCED }, {
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// eslint-disable-next-line no-unused-vars -- required for `.length`
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toJSON: function toJSON(key) {
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var O = toObject(this);
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var pv = toPrimitive(O, 'number');
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return typeof pv == 'number' && !isFinite(pv) ? null :
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(!('toISOString' in O) && classof(O) == 'Date') ? toISOString.call(O) : O.toISOString();
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}
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});
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