Issue with Nullish Coalescing Operator (??) on Chrome 79 and below

[hchangjae]

Hello pino maintainers,

I've come across an issue while using the pino library in an environment running Chrome version 79 and below [can i use] It appears that the Nullish Coalescing Operator (??) used in the library isn't recognized by these older versions of Chrome, leading to a SyntaxError: Unexpected token '?'.

Given the widespread usage of Chrome and potential for projects to require support for older versions, it might be worth considering either:

• A transpilation step for backwards compatibility
• Adding a note in the documentation regarding the minimum supported browser versions.

Steps to reproduce:

1. Use pino library in a project with browser options. pino({ browser: { ... } })
2. Run the project in Chrome 79 or an older version.
3. Observe the SyntaxError.

I also tested this on Android Chrome version 78.0.3904 and observed the same issue.

Thank you for your work on this library, and I appreciate your attention to this matter.

[mcollina]

I don't think we have the bandwidth to do either. I think the only solution for your problem is to remove ??.. and a PR would be highly appreciated.

[jsumners]

Chrome 79 was released in 2019 (https://cloud.google.com/blog/products/chrome-enterprise/admin-insider-whats-new-in-chrome-enterprise-release-79). Chrome's LTS version is at 102 at the time of this post (https://support.google.com/chrome/a/answer/11333726). I do not see any reason we should try and support such an old release as 79.

[hchangjae]

Next.js supports Chrome 64+. Given that pino is recommended by Next.js, it would be beneficial for pino to also support this version. This ensures a consistent experience for developers using both tools.

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