Promise based filter function

[koriwi]

Needed this functionality really bad. So here it is.

[codecov]

Codecov Report

Merging #89 into master will increase coverage by 0.81%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #89      +/-   ##
==========================================
+ Coverage   83.47%   84.29%   +0.81%     
==========================================
  Files           5        5              
  Lines         115      121       +6     
  Branches       38       40       +2     
==========================================
+ Hits           96      102       +6     
  Misses          7        7              
  Partials       12       12

Impacted Files	Coverage Δ
src/index.ts	79.48% <100%> (+1.7%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 63651d3...2f7d270. Read the comment docs.

[championswimmer]

okay, looks good, but the reason for this ?

also, you should add a test that covers the promise based filtering, so that the coverage doesn't go down.

[koriwi]

Will take care about this tomorrow.

Why? To be able to use something like this
https://codesandbox.io/s/24vp95x72p

[cedricmay]

I could imaging using promises for a debounce like feature if the state is updating too fast and getting bigger, right? That might bring some performance improvements especially on mobile devices.

[koriwi]

@championswimmer i added a test. Had to use a timeout because to wait for storage change.
Would be nice if you could merge/publish in a timely manner, because deployment for me with github is blocked because of an npm bug with the prepare script.

[Juice10]

Any chance we could get this merged?