@detachhead/ts-helpers v7.0.0-38be65f531b05ac601780ce711717449e038c856
ts-helpers
various typescript helper functions and utility types
features
value tracking
this library includes many helper types and functions such as add, subtract, and substring which allow the values
to be known at compile time
noUncheckedIndexedAccess support
the noUncheckedIndexedAccess compiler flag is epic, but there's room for improvement. for example, the following
issue:
if (foo.length > 2) {
const bar: string = foo[1] //error: string | undefined not assignable to string
}can be solved with lengthGreaterThan
import { lengthGreaterThan } from '@detachhead/ts-helpers'
if (lengthGreaterThan(foo, 2)) {
const bar: string = foo[1] //no error, foo is casted to [string, string]
}there's also lengthLessThan, lengthGreaterOrEqual, etc.
most of the array functions in this library keep track of the length, mostly thanks
to this TupleOf utility type
date formatter type
this library contains a helper type and function for formatting dates using
the date-fns format.
const date = formatDate(new Date(), 'dd-MM-yyyy')
assert(date === '01/01/2021') //compile error, wrong date formatyou can use any date format that date-fns accepts, and the FormatDate utility type will generate a template literal
type to match your desired date format.
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