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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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