# isBefore method

bool isBefore (DateTime other)

Returns true if this occurs before `other`.

The comparison is independent of whether the time is in UTC or in the local time zone.

    var now = new DateTime.now();
    var earlier = now.subtract(const Duration(seconds: 5));
    assert(earlier.isBefore(now));
    assert(!now.isBefore(now));

    // This relation stays the same, even when changing timezones.
    assert(earlier.isBefore(now.toUtc()));
    assert(earlier.toUtc().isBefore(now));

    assert(!now.toUtc().isBefore(now));
    assert(!now.isBefore(now.toUtc()));

## Implementation

    external bool isBefore(DateTime other);