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