How to get current page number in Word js

<pgNum> (Page Number Block)

This element specifies the presence of a page number block at the current location in the run content. A page number block is a non-editable region of text which shall display the current page using ascending decimal numbers.

Note

The page number block is a legacy construct used for compatibility with older word processors, and should not be produced unless it was consumed while reading a document – it is recommended that the PAGENUM field is used in its place.

A page number block shall be displayed using ascending decimal numbers, regardless of the languages specified in the parent run’s <lang> property.

<w:r>
  <w:t xml:space="preserve">This is the current page: </w:t>
  <w:pgNum />
</w:r>

This run specifies that a page number block shall be placed after the text string literal This is the current page: in the document. Assuming that this content is on the first page, this run would be displayed as follows:

This is the current page: 1