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42289f25c6
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
30 lines
1.1 KiB
Markdown
30 lines
1.1 KiB
Markdown
@name No Provider Found
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@category runtime
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@videoUrl https://www.youtube.com/embed/lAlOryf1-WU
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@shortDescription No provider for {token} found!
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@description
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You see this error when you try to inject a service but have not declared a corresponding provider. A provider is a mapping that supplies a value that you can inject into the constructor of a class in your application.
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Read more on providers in our [Dependency Injection guide](guide/dependency-injection).
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@debugging
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Work backwards from the object where the error states that a [provider](guide/architecture-services) is missing: `No provider for ${this}!`. This is commonly thrown in [services](tutorial/toh-pt4), which require non-existing providers.
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To fix the error ensure that your service is registered in the list of providers of an `NgModule` or has the `@Injectable` decorator with a `providedIn` property at top.
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The most common solution is to add a provider in `@Injectable` using `providedIn`:
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<code-example format="typescript" language="typescript">
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@Injectable({ providedIn: 'app' })
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</code-example>
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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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