p-cascadeSelect optionGroupChildren wrong type definition

[fabien-ml]

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Current behavior
When using p-cascadeSelect [optionGroupChildren]="['states', 'cities']" (like in the doc), the typescript compiler says "Type 'string[]' is not assignable to type 'string'".

Setting the type manually to string[] in the .d.ts file of primeng fix it.

Expected behavior
Should no cause error.

Minimal reproduction of the problem with instructions

• Create a new angular project en vscode
• Add primeng
• Folow primeng cascade select doc example

Please tell us about your environment:

• Mac OS
• VS Code
• NPM

• Angular version: 11.2.3

• PrimeNG version: 11.2.3

[yigitfindikli]

Hi @fabien-ml,

I couldn't replicate it with v11.2.3 can you share a sample project or stackblitz example?

[fabien-ml]

Hi, here is a sample project and screenshot from my ide.

primeng-sandbox.zip

[yigitfindikli]

Thanks for your report and effort. I'll add this issue to our roadmap.