Today I’ve published a new set of libraries to NPM - RxJS Primitives .
These are based on some operators I’ve collected over the last year, and some additional ones I’ve started adding.
Most are based around ECMASCript objects such as String
, Number
and Boolean
but also includes some useful
utility operators.
Over the coming weeks I’ll add more operators, both based on ECMAScript methods and custom functions that I have found useful.
The following modules are on NPM:
rxjs-string
@tinynodes/rxjs-string
operators that are built around the String
object in ECMAScript, for example with toUpperCase
:
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There are also some boolean value operators such as endsWith
and extraction operators like charAt
, with plans
to add more useful utilities. For example endWith
returns a boolean value, but I also want to include an endsWith
that returns the original value instead (like filter
).
rxjs-number
@tinynodes/rxjs-number
operators that are built around the Number
object in ECMAScript, for example parseFloat
/parseInt
and isNaN
.
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This also includes toString
which uses Number.prototype.toLocaleString
supports formatting such as currency.
rxjs-boolean
@tinynodes/rxjs-boolean
operators that are built around the Boolean
object in ECMAScript,
and are designed to help with filtering content from observables. Currently, there are two operators firstTruthy
and filterTruthy
.
In both cases these return the underlying value only if it’s a truthy value in JavaScript, in the case of firstTruthy
it only returns
the first value, while filterTruthy
returns all truthy values.
rxjs-utility
@tinynodes/rxjs-utility is a custom module that provides some additional operators that don’t fit into the other packages but still have some usefulness.
Currently, there are two operators:
startWithTap
- Will fire a callback method only on the first emission from an Observable
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debounceWithQuery
- Debounces an input such as a text input and passes it to a method that returns a value from a query (such as a search)
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