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docs: format null as code fragment + fix description of returned value (#40852) 

PR Close #40852
This commit is contained in:
Alexey Elin 2021-02-15 12:34:51 +03:00 committed by Joey Perrott
parent e3c21c5465
commit f4f7c33e1f
2 changed files with 6 additions and 6 deletions
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2
packages/core/src/di/injector_compatibility.ts
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@ -126,7 +126,7 @@ Please check that 1) the type for the parameter at index ${
* @param flags Optional flags that control how injection is executed.
* The flags correspond to injection strategies that can be specified with
* parameter decorators `@Host`, `@Self`, `@SkipSef`, and `@Optional`.
* @returns True if injection is successful, null otherwise.
* @returns the injected value if injection is successful, `null` otherwise.
*
* @usageNotes
*

10
packages/core/src/di/metadata.ts
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@ -71,14 +71,14 @@ export interface OptionalDecorator {
/**
* Parameter decorator to be used on constructor parameters,
* which marks the parameter as being an optional dependency.
* The DI framework provides null if the dependency is not found.
* The DI framework provides `null` if the dependency is not found.
*
* Can be used together with other parameter decorators
* that modify how dependency injection operates.
*
* @usageNotes
*
* The following code allows the possibility of a null result:
* The following code allows the possibility of a `null` result:
*
* <code-example path="core/di/ts/metadata_spec.ts" region="Optional">
* </code-example>
@ -118,7 +118,7 @@ export interface SelfDecorator {
* which tells the DI framework to start dependency resolution from the local injector.
*
* Resolution works upward through the injector hierarchy, so the children
* of this class must configure their own providers or be prepared for a null result.
* of this class must configure their own providers or be prepared for a `null` result.
*
* @usageNotes
*
@ -216,7 +216,7 @@ export interface HostDecorator {
*
* @usageNotes
*
* The following shows use with the `@Optional` decorator, and allows for a null result.
* The following shows use with the `@Optional` decorator, and allows for a `null` result.
*
* <code-example path="core/di/ts/metadata_spec.ts" region="Host">
* </code-example>
@ -244,4 +244,4 @@ export interface Host {}
export const Host: HostDecorator =
// Disable tslint because `InternalInjectFlags` is a const enum which gets inlined.
// tslint:disable-next-line: no-toplevel-property-access
attachInjectFlag(makeParamDecorator('Host'), InternalInjectFlags.Host);
attachInjectFlag(makeParamDecorator('Host'), InternalInjectFlags.Host);