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Joe Martin (Crowdstaffing)
61894570f1
improve markdown for documentation. Duplicate of #45325 that targets 13.3.x. PR Close #45590
33 lines
1.2 KiB
Markdown
33 lines
1.2 KiB
Markdown
@name Invalid Element
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@category compiler
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@shortDescription Unknown HTML element or component
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@description
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One or more elements cannot be resolved during compilation because the element is not defined by the HTML spec, or there is no component or directive with such element selector.
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<div class="alert is-helpful">
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This is the compiler equivalent of a common runtime error `NG0304: '${tagName}' is not a known element: …`.
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</div>
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@debugging
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Use the element name in the error to find the file(s) where the element is being used.
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Check that the name and selector are correct.
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If the component is from a different module or import, check that the component is exported from its origin module and imported into the correct `*.modules.ts` file, and declared in the imports list.
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When using custom elements or web components, ensure that you add [`CUSTOM_ELEMENTS_SCHEMA`](api/core/CUSTOM_ELEMENTS_SCHEMA) to the application module.
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If this does not resolve the error, check the imported libraries for any recent changes to the exports and properties you are using, and restart your server.
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<!-- links -->
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<!-- external links -->
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<!-- end links -->
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@reviewed 2022-02-28
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