angular-cn/aio/content/errors/NG2003.md

@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](api/core/InjectionToken) 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](errors/NG0201).
docs: add guides for the top 10 errors (#40060) add top 10 error guides provide description and debugging for top errors PR Close #40060 2021-01-13 20:34:57 -05:00			`@name Missing Token`
			`@category compiler`
			`@shortDescription No suitable injection token for parameter`

			`@description`
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 2021-02-18 11:42:45 -05:00			`There is no injection token for a constructor parameter at compile time. [InjectionTokens](api/core/InjectionToken) are tokens that can be used in a Dependency Injection Provider.`
docs: add guides for the top 10 errors (#40060) add top 10 error guides provide description and debugging for top errors PR Close #40060 2021-01-13 20:34:57 -05:00
			`@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`.

docs: fix links to docs with ambiguous paths (#41788) These docs were linking directly to docs that have ambiguous paths. These changes ensure that these links are not affected by the disambiguation processing of those docs. PR Close #41788 2021-04-23 11:06:01 -04:00			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](errors/NG0201).