VueJS 3: Typescript - Map.groupBy - marked as error in VSCode, but still working fine

[TElbek]

I'm trying to learn Typescript together with VueJS3 and NodeJS.
I'm using Typescript 5.8.0 and VueJS 3.5.17.

Right now I'm trying to resolve an issue with Map.groupBy:
const byTrip = computed(() => { const listSorted = state.forskelAar.sort((a,b) => a.dato.localeCompare(b.dato)).reverse(); return Map.groupBy(listSorted, (one: forskelStructure) => one.titel); });

The code works fine in the browser, but VSCode code-editor flags it as a problem:
Property 'groupBy' does not exist on type 'MapConstructor'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2024' or later.

Thanks for any advice to resolve this issue.

[jacekkarczmarczyk]

Did you try changing the 'lib' compiler option to 'es2024' or later?

[TElbek]

I tried to add the following in tsconfig.node.json - but no cure.
` "compilerOptions": {
"noEmit": true,
"lib": ["ES2024"],
"tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",

"module": "ESNext",
"moduleResolution": "Bundler",
"types": ["node"]

}`

[jacekkarczmarczyk]

is tsconfig.node.json your only tsconfig file?

[TElbek]

Yeeah - problem solved. I had a second look, and found that tsconfig.app.json also has a "compilerOptions" section.
Adding the suggested "lib": ["ES2024"] property and value, solved the issue,