Paginator issues with the data length

[buster95]

Reproduction

Use StackBlitz to reproduce your issue: https://stackblitz.com/fork/components-issue

https://stackblitz.com/angular/lrnjnmrrmlp?file=src%2Fapp%2Fpaginator-configurable-example.ts

Steps to reproduce:

1. go to last page
2. then change the data length
   A blank page appears, since the length of the current data is not filling up to the current page, you must press the button on the previous page many times

Expected Behavior

What behavior were you expecting to see?
I want that the paginator current page change to 1 because if the data change you dont know if the current data length could be filling the current page

Actual Behavior

What behavior did you actually see?
current page is in empty

Environment

• Angular: 8.2.4
• CDK/Material: 8.1.4
• Browser(s): Chrome
• Operating System (e.g. Windows, macOS, Ubuntu): Windows 10 1902

[ccjmne]

I don't think this should be the Paginator's responsibility.

What if I build a UI that lets users remove an item from the collection in a single click? They wouldn't want to be brought back to the first page.

I think it's reasonable that it is up to you to call paginator.firstPage() when your data model is updated, if you desire so.

[andrewseguin]

We intentionally designed the MatPaginator to simply display what it is told, rather than automatically deciding what to do when the page is out of range of the length. Unfortunately there is no one-size-fits-all solution to automatically selecting a page in this case

[buster95]

I don't think this should be the Paginator's responsibility.

What if I build a UI that lets users remove an item from the collection in a single click? They wouldn't want to be brought back to the first page.

I think it's reasonable that it is up to you to call paginator.firstPage() when your data model is updated, if you desire so.

I try to do that but not work, I don't know why, How can I get paginator variable?? can you help me please

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