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天文台pc/tianwentai-ui/node_modules/date-fns/addDays.js 1.07 KB
bc518174   王天杨   提交两个项目文件
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  "use strict";
  exports.addDays = addDays;
  var _index = require("./toDate.js");
  var _index2 = require("./constructFrom.js");
  
  /**
   * @name addDays
   * @category Day Helpers
   * @summary Add the specified number of days to the given date.
   *
   * @description
   * Add the specified number of days to the given date.
   *
   * @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
   *
   * @param date - The date to be changed
   * @param amount - The amount of days to be added.
   *
   * @returns The new date with the days added
   *
   * @example
   * // Add 10 days to 1 September 2014:
   * const result = addDays(new Date(2014, 8, 1), 10)
   * //=> Thu Sep 11 2014 00:00:00
   */
  function addDays(date, amount) {
    const _date = (0, _index.toDate)(date);
    if (isNaN(amount)) return (0, _index2.constructFrom)(date, NaN);
    if (!amount) {
      // If 0 days, no-op to avoid changing times in the hour before end of DST
      return _date;
    }
    _date.setDate(_date.getDate() + amount);
    return _date;
  }