Forum Discussion
Problem using "d3-array".rollup (and it spread argument) in a Power BI Custom Visual
Hi Schizzomarino ,
Sorry, but I took a shot before trying it myself. But if I change the key attribute to ...key: any[] I can get your code working.
I do realise that the typing are a bit off now, but looks like TypeScript doesn't work correctly with this type of parameter binding.
But the most important thing: it compiles!
-JP
Thanks Evgenii v-evelk ,
I am using pbiviz 3.1.5 and have imported the rollup function from d3-array as such:
- import { rollup } from "d3-array"
(I have also installed the types for d3 and it)
- npm install --save @types/d3
- npm install --save @types/d3-array
And when only one key is used the rollup function works, it looks to me the problem resides in recognising and using the spread operator that is part of the arguments for rollup.
I am thinking it might be a typescript limitation rather than Power BI, but was hoping for a workaround that would allow me to use the data functions within d3 (rather than recoding them in typescript myself)
best,
Daniel
Hi Schizzomarino ,
It looks to me that it is an issue with the current typedefinitions (@types/d3-array) as the current only accepts one key, see: https://github.com/DefinitelyTyped/DefinitelyTyped/blob/cbcfdd4b12b863a82f5f1903c47fe22fa3b6975c/types/d3-array/index.d.ts#L245 There is already an issue reported, but with not much happening: https://github.com/DefinitelyTyped/DefinitelyTyped/issues/32162
This kind of errors are usually related to outdated typedefinitions used by TypeScript and you can easily update the current typedefiniton and add the missing '...'
-JP