Support bigint type for Intl.NumberFormat.formatToParts

[carlansley]

lib Update Request

Configuration Check

My compilation target is ES2020 and my lib is esnext.

Missing / Incorrect Definition

Intl.NumberFormat.formatToParts(number?: number).

The number parameter can also be a bigint.

Sample Code

This valid code:

Intl.NumberFormat([], {
  style: 'currency',
  currency: 'USD',
}).formatToParts(3500n);

Produces compiler error:

error TS2345: Argument of type '3500n' is not assignable to parameter of type 'number | undefined'.

Documentation Link

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/NumberFormat/formatToParts

[rastenis]

I have opened a PR to address this issue: #44015