feat(config): add logLevel option to suppress ionic warnings and errors

[sean-perkins]

Issue number: resolves #29814

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What is the current behavior?

Developers may receive Ionic warnings and errors in their console, logs and CI runs (for tests). Currently there is not a mechanism for developers to opt-out of these logs in situations where they are intentionally configuring Ionic in a way to produce a warning.

What is the new behavior?

• Developers can assign a value to logLevel in the Ionic config to control the log level that Ionic will produce logs for.
  • OFF will completely disable all warnings and errors from Ionic
  • WARN will log warnings and errors
  • ERROR will log only errors
• Default behavior is that developers receive both Ionic warnings and errors
• Configuration only applies to usages of printIonWarning and printIonError

Does this introduce a breaking change?

• Yes
• No

Other information

This feature, if accepted, should be targeted to a minor release.

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Name	Status	Preview	Comments	Updated (UTC)
ionic-framework	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jan 20, 2025 9:02pm

[brandyscarney]

Can we put this against a feature branch?

[christian-bromann]

Overall LGTM 👍

Nit:
I would maybe create an enum for log levels, e.g.:

const enum LogLevel {
    INFO = 'INFO',
    ERROR = 'ERROR',
    WARN = 'WARN'
}

So renaming the log levels or enhancing them will be easier.

[thetaPC]

LGTM

[christian-bromann]

👍

[thetaPC]

LGTM