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Generic type 'Layer<SourceType, RendererType>' requires 2 type argument(s).

See original GitHub issue

Describe the bug After upgrading our lib to use ol@6.10.0 or ol@6.11.0, the build fails with the above-mentioned errors.

Error: projects/hslayers/src/components/utils/layer-utils.service.ts:408:27 - error TS2314: Generic type 'Layer<SourceType, RendererType>' requires 2 type argument(s).

408   isLayerClustered(layer: Layer<Source>): boolean {

etc.

Our lib is based on Angular (i.e. TypeScript).

There is a question from my side, rather then a direct bug report, whether there was some undocumented breaking change happening between versions 6.9 and 6.10?

To Reproduce Steps to reproduce the behavior:

Use openlayers in a TS application
Use Layer<Source> as a type
Compile the app and see error

Expected behavior No breaking changes when upgrading between minor-releases.

Issue Analytics

State:
Created 2 years ago
Comments:9 (9 by maintainers)

Top GitHub Comments

1reaction

ahocevarcommented, Jan 26, 2022

Thanks @jmacura. I just created #13291, which will fix this issue. No generic types for Layer are required any more, but you may set a Source type (or even a Renderer type, which probably does not make sense in most cases) if you wish.

1reaction

ahocevarcommented, Jan 12, 2022

Apologies for this. Since this change is not a breaking change for JavaScript users, we did not increase the major version. Also see “API change policy” on https://openlayers.org/en/latest/apidoc/.

This change was made for avoiding type casts in the library, and we had not considered the implications for TypeScript users. Ideally, this change would not have had a user facing impact.

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