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angular-cn/aio/content/errors/NG2003.md
George Kalpakas fb58a2bd54 fix(docs-infra): use relative URLs for internal links on error pages (#40881) 
Previously, some of the links on the error pages had URLs prefixed with
`https://angular.io/`. This caused them to be treated as external URLs,
which had the following downsides:
- Links would always point to `angular.io` instead of the same version
  as the error page (e.g. `next.angular.io` or `v11.angular.io`).
- Dgeni would not be able to check that the URLs are valid (i.e. point
  to existing pages).
- An external link icon would incorrectly be shown next to the links on
  `angular.io`.

This commit fixes the links to use relative URLs.

PR Close #40881
2021-02-19 09:14:59 -08:00

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@name Missing Token @category compiler @shortDescription No suitable injection token for parameter

@description There is no injection token for a constructor parameter at compile time. InjectionTokens are tokens that can be used in a Dependency Injection Provider.

@debugging Look at the parameter that throws the error and all uses of the class. This error is commonly thrown when a constructor defines parameters with primitive types like string, number, boolean, and Object.

Use the @Injectable method or @Inject decorator from @angular/core to ensure that the type you are injecting is reified (has a runtime representation). Make sure to add a provider to this decorator so that you do not throw NG0201: No Provider Found.