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- var startOfDay = require('../start_of_day/index.js')
- /**
- * @category Day Helpers
- * @summary Is the given date yesterday?
- *
- * @description
- * Is the given date yesterday?
- *
- * @param {Date|String|Number} date - the date to check
- * @returns {Boolean} the date is yesterday
- *
- * @example
- * // If today is 6 October 2014, is 5 October 14:00:00 yesterday?
- * var result = isYesterday(new Date(2014, 9, 5, 14, 0))
- * //=> true
- */
- function isYesterday (dirtyDate) {
- var yesterday = new Date()
- yesterday.setDate(yesterday.getDate() - 1)
- return startOfDay(dirtyDate).getTime() === startOfDay(yesterday).getTime()
- }
- module.exports = isYesterday
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