DataTable: dataKey Property not relevant for expanding rows

[simeon-s1]

Describe the bug

Expanded rows can either be an array of row data or when dataKey is present, an object whose keys are strings referring to the identifier of the row data and values are booleans

As of now, even with a given dataKey, the expandedRows property doesn't accept an empty object or primevue/datatable/DataTableExpandedRows object.

With expandedRows given as null, the table will fill it with an array of row objects, like it should without dataKey.

Reproducer

https://codesandbox.io/s/reverent-visvesvaraya-xypq5s?file=/src/App.vue

PrimeVue version

3.24

Vue version

3.x

Language

TypeScript

Build / Runtime

Vue CLI App

Browser(s)

Chrome 111

Steps to reproduce the behavior

expand any row, check expandedRows Property

codesandbox kinda broken, maybe a refresh is required

Expected behavior

As described in linked doc

[RayOneKa]

Same thing here. Table with 10 rows works fine, but with a larger number of rows, the expansion takes about a second to expand. primevue 3.24.0

[Christoph-Wagner]

Still an issue for 3.37.0

[elensky]

Looking forward this to be fixed. Having big performance issues even with 100 rows, but it is noticeable even with 25 rows (with objects up to 20 properties). We also having worse performance in Firefox comparing to Chrome.

version - 3.42.0

[mertsincan]

Fixed the dataKey and performance issues in #4977