yup/es/date.js

import MixedSchema from './mixed';
import inherits from './util/inherits';
import isoParse from './util/isodate';
import { date as locale } from './locale';
import isAbsent from './util/isAbsent';
import Ref from './Reference';
var invalidDate = new Date('');

var isDate = function isDate(obj) {
  return Object.prototype.toString.call(obj) === '[object Date]';
};

export default DateSchema;

function DateSchema() {
  var _this = this;

  if (!(this instanceof DateSchema)) return new DateSchema();
  MixedSchema.call(this, {
    type: 'date'
  });
  this.withMutation(function () {
    _this.transform(function (value) {
      if (this.isType(value)) return value;
      value = isoParse(value); // 0 is a valid timestamp equivalent to 1970-01-01T00:00:00Z(unix epoch) or before.

      return !isNaN(value) ? new Date(value) : invalidDate;
    });
  });
}

inherits(DateSchema, MixedSchema, {
  _typeCheck: function _typeCheck(v) {
    return isDate(v) && !isNaN(v.getTime());
  },
  min: function min(_min, message) {
    if (message === void 0) {
      message = locale.min;
    }

    var limit = _min;

    if (!Ref.isRef(limit)) {
      limit = this.cast(_min);
      if (!this._typeCheck(limit)) throw new TypeError('`min` must be a Date or a value that can be `cast()` to a Date');
    }

    return this.test({
      message: message,
      name: 'min',
      exclusive: true,
      params: {
        min: _min
      },
      test: function test(value) {
        return isAbsent(value) || value >= this.resolve(limit);
      }
    });
  },
  max: function max(_max, message) {
    if (message === void 0) {
      message = locale.max;
    }

    var limit = _max;

    if (!Ref.isRef(limit)) {
      limit = this.cast(_max);
      if (!this._typeCheck(limit)) throw new TypeError('`max` must be a Date or a value that can be `cast()` to a Date');
    }

    return this.test({
      message: message,
      name: 'max',
      exclusive: true,
      params: {
        max: _max
      },
      test: function test(value) {
        return isAbsent(value) || value <= this.resolve(limit);
      }
    });
  }
});