| 123456789101112131415161718192021 | '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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