isSupported returns true when redirecting stdout on windows

[mdonnalley]

Current behaviour

On windows, ansis.isSupported() returns true when redirecting stdout to a file. On mac (and I'm assuming linux) it returns false.

This leads to ansi characters showing up in the file containing the redirected stdout. For example:

�[1mhello world�[22m

Expected behaviour

I expect ansis.isSupported() to return false when redirecting stdout to a file, regardless of operating system. This would be consistent with the supports-color package

Reproduction Example

git clone https://github.com/mdonnalley/ansis-bug.git
cd ansis-bug
npm install
node index.js > output.txt

On windows:

PS C:\Users\username\code\ansis-bug> node index.js > output.txt
PS C:\Users\username\code\ansis-bug> cat output.txt
ansis.isSupported true
supportsColor.stdout false

On mac:

❯ node index.js > output.txt
❯ cat output.txt
ansis.isSupported false
supportsColor.stdout false

Environment

• OS: Windows
• version of Node.js: 20.13.1
• version of Webpack: NA
• version of the Plugin: NA

Additional context

NA

[webdiscus]

Hello @mdonnalley,

Thanks for the issue report. I will fix it.
What is Windows version: 10, 11, ... ?

[mdonnalley]

@webdiscus thanks! I'm on Windows 11

[webdiscus]

@mdonnalley

the issue is fixed in the v3.3.2.
Can you please test it?

[mdonnalley]

@webdiscus just tested and it's working as expected - thanks so much for quick turnaround!