Feature: Bundle logger

[hirasso]

The problem
@swup/debug-plugin has a few limitations that are hard to change without breaking changes, the biggest being that it expexts a fixed amount of arguments (message and object).

I'd like to introduce a new global logging mechanism into Swup, that consumers and plugins could make use of out of the box. I'd propose consola as the logging library.

The consumer imports the logger instance as a named import and injects it into swup:

import Swup, { logger } from "swup";
new Swup({ logger });

Plugins can now call the logger:

this.swup.logger?.info("plugin initialized");

Pros

• Shouldn't increase bundle size when not used
• Unified logging interface without the current limitations of @swup/debug-plugin

Limitations

UMD builds would need to use consola directly.

Alternatives considered

Separate logging implementation on the plugin level. Could become cumbersome quickly.

How important is this feature to you?

• Nice to have

[daun]

Could there be some way of sticking with the debug plugin? I like the Logger class a bit more, but it'd be nice to have some continuity in how everything in swup is handled with plugins.

[hirasso]

Yea, makes sense to stick to the debug plugin if possible @daun.

Anyways, we can put a pin in this for now, no need to introduce this for swup@4.