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Is Same or Before
2.11.0
moment().isSameOrBefore(Moment|String|Number|Date|Array); moment().isSameOrBefore(Moment|String|Number|Date|Array, String);

Check if a moment is before or the same as another moment. The first argument will be parsed as a moment, if not already so.

moment('2010-10-20').isSameOrBefore('2010-10-21');  // true
moment('2010-10-20').isSameOrBefore('2010-10-20');  // true
moment('2010-10-20').isSameOrBefore('2010-10-19');  // false

If you want to limit the granularity to a unit other than milliseconds, pass the units as the second parameter.

As the second parameter determines the precision, and not just a single value to check, using day will check for year, month and day.

moment('2010-10-20').isSameOrBefore('2009-12-31', 'year'); // false
moment('2010-10-20').isSameOrBefore('2010-12-31', 'year'); // true
moment('2010-10-20').isSameOrBefore('2011-01-01', 'year'); // true

Like moment#isAfter and moment#isSame, any of the units of time that are supported for moment#startOf are supported for moment#isSameOrBefore:

year month week day hour minute second