`Intl.NumberFormat`: `maximumFractionDigits` is used for exact number of digits instead of maximum for `style: "currency"`

[amitbeck]

Version

v22.14.0

Platform

Darwin MacBook-Pro 24.3.0 Darwin Kernel Version 24.3.0: Thu Jan  2 20:24:23 PST 2025; root:xnu-11215.81.4~3/RELEASE_ARM64_T6020 arm64

Subsystem

No response

What steps will reproduce the bug?

Run the following:

Intl.NumberFormat('en-US', {
  notation: 'compact',
  maximumFractionDigits: 1,
  style: 'currency',
  currency: 'USD'
}).format(3_000_000)

How often does it reproduce? Is there a required condition?

Constantly

What is the expected behavior? Why is that the expected behavior?

The previous code snippet should output "$3M", because the number is round, notation is set to "compact" and maximumFractionDigits is set to 1. For comparison Chrome 133.0.6943.98 (V8 13.3.415.21) correctly outputs "$3M".

What do you see instead?

The previous code outputs "$3.0M" in Node.js v22.14.0 (V8 12.4.254.21-node.22), while Chrome 133.0.6943.98 (V8 13.3.415.21) outputs "$3M".

It seems that when using style: "currency" and specifying maximumFractionDigits, for some reason Node.js uses that number as the exact number of fraction digits instead of a maximum.

Additional information

No response

[targos]

This will be fixed in the next V8 update (#57114), but only in v24.