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@roku-sdk/compat

v2.19.1

Published

Shims that stand in for SceneGraph nodes older Roku OS firmware lacks

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Links

Git

Maintainers

jroberts_rokujroberts_rokuckodalickodalirokudev1rokudev1rokudev2rokudev2

Keywords

Readme

@roku-sdk/compat

Shims for SceneGraph nodes that the SDK renders but firmware does not report as supported.

The package is a side-effect import. rk build and rk dev inject it ahead of the app entry, so apps do not import it themselves. Set app.compat: false in roku-config.ts to leave it out.

What it does

Each shim registers a tag alias with registerTagAlias from @roku-sdk/solid. When the tag is created, the alias asks hasFeature("tween") from @roku-sdk/runtime/has-feature whether the firmware has the real node. If it does, the real node is created. If not, the shim is created instead.

| Tag | Native node | Firmware feature | Shim | | --------- | ----------- | -------------------------- | -------------- | | <tween> | Tween | roku.hasFeature("tween") | RsgTweenShim |

hasFeature returns false when roku or roku.hasFeature is absent, including Jest. The firmware feature set starts empty; until firmware adds "tween", devices use the shim regardless of their OS version.

When app.compat: false, the Roku build injects only the native-or-refusal registration, not the shim XML or BrightScript. Importing @roku-sdk/rsg-ts alone performs no registration; only the Roku build injects these entries.

In a Roku build without shims, creating a gated tag when its feature is not reported throws an error naming the missing firmware feature and this package. That is deliberate: a SceneGraph node type the firmware does not have fails silently and leaves an empty screen.

Retiring a shim

Removing a shim drops support for every firmware that does not report its native feature, so it is a breaking change:

  • Remove shims only in a major SDK release, and state which firmware features that release requires.
  • Batch removals into one release rather than shipping one breaking release per shim.
  • Remove the shim's directory here and its entry in refuse-gated-tags.ts once all supported firmware reports the feature. @roku-sdk/solid does not change.

An app that must keep running on older firmware can stay on the last @roku-sdk/compat release that has the shim it needs.