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'use strict';
var $export = require('./_export');
var toObject = require('./_to-object');
var toPrimitive = require('./_to-primitive');
var toISOString = require('./_date-to-iso-string');
var classof = require('./_classof');
$export($export.P + $export.F * require('./_fails')(function () {
return new Date(NaN).toJSON() !== null
|| Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;
}), 'Date', {
// eslint-disable-next-line no-unused-vars
toJSON: function toJSON(key) {
var O = toObject(this);
var pv = toPrimitive(O);
return typeof pv == 'number' && !isFinite(pv) ? null :
(!('toISOString' in O) && classof(O) == 'Date') ? toISOString.call(O) : O.toISOString();
}
});
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