feat: Migrate Logger to Typescript

[gtamanaha]

Background

As part of the ongoing effort to migrate the mParticle Web SDK codebase to TypeScript, the logger.js module needed to be converted to TypeScript to improve type safety, code maintainability, and developer experience. The logger is a core component used throughout the SDK for handling different log levels (none, error, warning, verbose) and custom logger implementations.

What Has Changed

• Migrated src/logger.js to src/logger.ts
  • Converted the Logger class to TypeScript with proper type annotations
  • All methods now have explicit parameter and return types
• Added Type Definitions
  • Created ILoggerConfig type that picks logLevel and logger properties from SDKInitConfig
  • Created IConsoleLogger type that picks error, warning, and verbose methods from SDKLoggerApi and wraps them in Partial<> to make methods optional
  • Both types reuse existing SDK interfaces to maintain consistency
• Enhanced Type Safety
  • Used Partial<Pick<>> utility types to ensure IConsoleLogger matches the optional method signature pattern from MPConfiguration.Logger
  • Properly typed the logLevel property using the LogLevelType enum constants (LogLevelType.Warning, LogLevelType.None, etc.) instead of string literals
  • Maintained the safe hasOwnProperty check in the constructor to handle edge cases with falsy logger values
• Exported ConsoleLogger
  • Made ConsoleLogger class exportable for potential reuse in tests and other modules
• Updated Test Files
  • Modified test/src/tests-audience-manager.ts and test/src/tests-batchUploader.ts to work with the new TypeScript logger implementation
• Built Distribution Files
  • Regenerated dist/mparticle.common.js, dist/mparticle.esm.js, and dist/mparticle.js to include the TypeScript-compiled logger

Screenshots/Video

• {Include any screenshots or video demonstrating the new feature or fix, if applicable}

Checklist

• I have performed a self-review of my own code.
• I have made corresponding changes to the documentation.
• I have added tests that prove my fix is effective or that my feature works.
• I have tested this locally.

Additional Notes

• {Any additional information or context relevant to this PR}

Reference Issue (For employees only. Ignore if you are an outside contributor)

• Closes https://go/j/[ticket-number]

[rmi22186]

minor nits

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[rmi22186]

LGTM. I modified the PR to go into blackout2025 just in case we have a hotfix that we need.