@spectrum-web-components/core
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Abstract base classes for Spectrum Web Components.
This package provides the behavior layer for 2nd-gen Spectrum Web Components and is not intended for direct external use. It is independent from 1st-gen — there is no runtime dependency between them.
For more information, visit the Spectrum Web Components repository.
The core package is private/internal, so we can organize foundational code for discoverability and incremental migration.
core/
element/ # SpectrumElement, defineElement, and element infrastructure
mixins/ # Reusable mixins (SizedMixin, ObserveSlotPresence, etc.)
controllers/ # Reactive controllers (Lit controllers, observers, etc.)
utils/ # Utility functions (DOM helpers, label extraction, etc.)
components/ # Component base classes (already established)
All new folders and files in /core should be kebab-case.
Prefer the new top-level paths for new code:
@spectrum-web-components/core/element@spectrum-web-components/core/mixins@spectrum-web-components/core/controllers@spectrum-web-components/core/utilsNew code should use the top-level paths above.
See MIGRATION.md for guidance on where to place migrated code.
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Abstract base classes for Spectrum Web Components
The npm package @spectrum-web-components/core receives a total of 9,724 weekly downloads. As such, @spectrum-web-components/core popularity was classified as popular.
We found that @spectrum-web-components/core demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 9 open source maintainers collaborating on the project.
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