2021-01-13 17:34:57 -08:00
@name Invalid Element
@category compiler
@shortDescription Unknown HTML element or component
@description
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.
2021-01-19 21:17:25 -08:00
<div class="alert is-helpful">
docs: improve markdown (#45325)
The purpose of the changes is to clean all markdown to match a single pedantic style.
* To ensure all changes in style are properly separated.
* To ensure all styled content aligns to nearest 4-character-tab.
* To ensure all code blocks use the Angular `<code-example>` or `<code-tab>` elements.
* To ensure all markdown exists outside of html tags.
* To ensure all images use the Angular style for `<img>` elements.
* To ensure that all smart punctuation is replaced or removed.
```text
’, ’, “, ”, –, —, …
```
* To ensure all content does not conflict with the following reserved characters.
```text
@, $, *, &, #, |, <, >,
```
* To ensure all content displays using html entities.
The following changes were made to files in the following directory.
```text
aio/content
```
The target files were markdown files.
The list of excluded files:
```text
.browserslistrc, .css, .conf, .editorconfig, .gitignore, .html, .js, .json, .sh, .svg, .ts, .txt, .xlf,
```
PR Close #45325
2022-03-10 08:48:09 -08:00
This is the compiler equivalent of a common runtime error `NG0304: '${tagName}' is not a known element: …` .
2021-01-19 21:17:25 -08:00
</div>
2021-01-13 17:34:57 -08:00
@debugging
2021-02-18 18:42:45 +02:00
Use the element name in the error to find the file(s) where the element is being used.
2021-01-13 17:34:57 -08:00
docs: improve markdown (#45325)
The purpose of the changes is to clean all markdown to match a single pedantic style.
* To ensure all changes in style are properly separated.
* To ensure all styled content aligns to nearest 4-character-tab.
* To ensure all code blocks use the Angular `<code-example>` or `<code-tab>` elements.
* To ensure all markdown exists outside of html tags.
* To ensure all images use the Angular style for `<img>` elements.
* To ensure that all smart punctuation is replaced or removed.
```text
’, ’, “, ”, –, —, …
```
* To ensure all content does not conflict with the following reserved characters.
```text
@, $, *, &, #, |, <, >,
```
* To ensure all content displays using html entities.
The following changes were made to files in the following directory.
```text
aio/content
```
The target files were markdown files.
The list of excluded files:
```text
.browserslistrc, .css, .conf, .editorconfig, .gitignore, .html, .js, .json, .sh, .svg, .ts, .txt, .xlf,
```
PR Close #45325
2022-03-10 08:48:09 -08:00
Check that the name and selector are correct.
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.
2021-01-13 17:34:57 -08:00
2021-05-19 21:20:23 +00:00
When using custom elements or web components, ensure that you add [`CUSTOM_ELEMENTS_SCHEMA` ](api/core/CUSTOM_ELEMENTS_SCHEMA ) to the application module.
2021-01-13 17:34:57 -08:00
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.
docs: improve markdown (#45325)
The purpose of the changes is to clean all markdown to match a single pedantic style.
* To ensure all changes in style are properly separated.
* To ensure all styled content aligns to nearest 4-character-tab.
* To ensure all code blocks use the Angular `<code-example>` or `<code-tab>` elements.
* To ensure all markdown exists outside of html tags.
* To ensure all images use the Angular style for `<img>` elements.
* To ensure that all smart punctuation is replaced or removed.
```text
’, ’, “, ”, –, —, …
```
* To ensure all content does not conflict with the following reserved characters.
```text
@, $, *, &, #, |, <, >,
```
* To ensure all content displays using html entities.
The following changes were made to files in the following directory.
```text
aio/content
```
The target files were markdown files.
The list of excluded files:
```text
.browserslistrc, .css, .conf, .editorconfig, .gitignore, .html, .js, .json, .sh, .svg, .ts, .txt, .xlf,
```
PR Close #45325
2022-03-10 08:48:09 -08:00
<!-- links -->
<!-- external links -->
<!-- end links -->
@reviewed 2022-02-28
