We received a report that GK420D printers were falling back to EPL mode,
turns out the product name provided via USB doesn't contain the usual
ZPL hints. I extrapolated some other probable names for EPL emulation
models and tossed them in to try and reduce future issues.

What's Changed

• Improve ZPL mark sense by @Cellivar in #69
• Show a clear error on OS driver errors by @Cellivar in #70
• Improve type guards for juggling command formats by @Cellivar in #71
• Update license declaration in package.json by @binaryf0x in #77
• Add more ZPL printer name patterns for EPL emulation by @Cellivar in #79

Full Changelog: v2.0.3...v2.0.4

What's Changed

• Remove double-offset from prints by @Cellivar in #68

Full Changelog: v2.0.2...v2.0.3

Switch off entirely to a custom encoder/decoder for ASCII as the TextEncoder and TextDecoder don't work for this use case.

What's Changed

• Add editor demo by @Cellivar in #65
• V2.0.2: ASCII strikes again by @Cellivar in #67

Full Changelog: v2.0.1...v2.0.2

Bugfix release, this resolves an issue setting ZPL sensor values manually.

What's Changed

• Fix: Correct mistake in ZPL sensor configs by @Cellivar in #64

Full Changelog: v2.0.0...v2.0.1

This overhaul rolls in a lot of lessons learned working on the Web ReceiptLine library and ESC/POS printers.

Async-first design

The previous library mixed sync and async operations in ways that made it more difficult to build into frameworks such as React. Constructors have been moved behind factory methods to reduce the prevalence of that sort of awkward relationship, along with a few other operations scattered around.

Printers are now event producers, and you can addEventHandler to listen to status and error messages from them. More docs coming soon.

Web-Device-Mux dependency

I've also started work on a web device abstraction library, with the goal of expanding support for Web Bluetooth and Web Serial, along with regular network operations to a webserver for network printing. This is a required dependency used as part of printer setup.

Language-specific commands and configs

To better support the complex nooks and crannies of specific languages there are now language-specific commands and configs able to be described by the library. The commands are namespaced according to their languages in the library's exports.

What's Changed

• v2: Ignore other devices by @Cellivar in #48
• Expose manufacturer metadata more cleanly by @Cellivar in #49
• Add removeEventListener by @Cellivar in #50
• Switch to web-device-mux library by @Cellivar in #52
• Fix issues setting black mark tracking by @Cellivar in #53
• Revert "Switch to web-device-mux library" by @Cellivar in #54
• Async-first rewrite of core logic by @Cellivar in #55
• Add backfeed suppression and update settings interface by @Cellivar in #56
• Improved message handling, better command handler layout by @Cellivar in #57
• Add more ZPL config commands by @Cellivar in #58
• Split things out for more testability by @Cellivar in #59
• Bump version to rc6 by @Cellivar in #60
• Add test configs for LP2824Plus by @Cellivar in #61
• Release version 2.0 by @Cellivar in #62

Full Changelog: v1.0.3...v2.0.0

What's Changed

• Add backfeed suppression and update settings interface by @Cellivar in #56
• Improved message handling, better command handler layout by @Cellivar in #57
• Add more ZPL config commands by @Cellivar in #58
• Split things out for more testability by @Cellivar in #59
• Bump version to rc6 by @Cellivar in #60

Full Changelog: v2.0.0-rc.5...v2.0.0-rc.6

The core logic of the application has been rewritten to focus on async operations instead of synchronous calls. The majority of the public API surface remains unaffected. Breaking changes are mostly related to renaming a few things, or needing to wrap things in promises.

A full changelog will be part of the full release.

Introduced a bug with inverted ZPL images.

What's Changed

• Add removeEventListener by @Cellivar in #50

Full Changelog: v2.0.0-rc.1...v2.0.0-rc.2

What's Changed

• Expose manufacturer metadata more cleanly by @Cellivar in #49

Full Changelog: v2.0.0-alpha.1...v2.0.0-rc.1