OpenINF/openinf-util-types

[feature request] add new `isNullish` predicate function

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#75 opened on Nov 5, 2022

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 (4 comments) (0 reactions) (0 assignees)TypeScript (2 forks)auto 404
enhancementgood first issue

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Description

Checks whether something is null or undefined.

Would be useful for https://github.com/openinf/util-object/pull/133. We can have it out in the next minor…

Can this be achieved solely using Nullish coalescing? Maybe in the TS, but now wondering what ES year we are searching for compatibility with since this is a relatively new language feature.

Refs: https://devblogs.microsoft.com/typescript/announcing-typescript-4-8/#improved-intersection-reduction-union-compatibility-and-narrowing

/cc @septs @ignoreintuition

Contributor guide

Research direction
Review existing predicate functions in the repository for patterns, then implement a new `isNullish` function using TypeScript's type narrowing.
Tech stack
typescript
Domain
developer experiencetooling
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
TypeScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75