Function isAssurBemlacha

isAssurBemlacha(
    currentTime: Date,
    location: Location,
    useElevation: boolean,
): boolean
Returns true if the given moment (date + time) falls within a period when melacha (work) is prohibited — i.e. Shabbat or a Yom Tov.

The Shabbat/Yom Tov window is taken to begin at sunset (shkiah) on the preceding day (Erev Shabbat / Erev Yom Tov / Yom Tov sheni) and to end at tzais (nightfall) on the day itself. Tzais is calculated using a solar depression of 8.5° for simplicity; consult a halachic authority for more stringent opinions.

useElevation controls whether the location's elevation is taken into account when computing sunset (it has no effect on the degree-based tzais calculation). The Israel/Diaspora schedule comes from location.getIsrael().

Throws if sunset cannot be calculated for the given location (e.g. polar regions).
Parameters
- currentTime: Date
  the moment to test (with hour/minute)
- location: Location
  geographic location (also supplies Israel/Diaspora flag and tzid)
- useElevation: boolean
  include elevation when computing sunset
Returns boolean
true if melacha is prohibited, false if it is not
Example
```
import {isAssurBemlacha, Location} from '@hebcal/core';
const loc = Location.lookup('Jerusalem')!;
// Friday after sunset:
isAssurBemlacha(new Date('2024-04-26T18:00:00Z'), loc, false); // true
```
- Defined in src/isAssurBemlacha.ts:63