fix(ivy): support static ViewChild queries (#28811)

This commit adds support for the `static: true` flag in
`ViewChild` queries. Prior to this commit, all `ViewChild`
queries were resolved after change detection ran. This is
a problem for backwards compatibility because View Engine
also supported "static" queries which would resolve before
change detection.

Now if users add a `static: true` option, the query will be
resolved in creation mode (before change detection runs).
For example:

```ts
@ViewChild(TemplateRef, {static: true}) template !: TemplateRef;
```

This feature will come in handy for components that need
to create components dynamically.

PR Close #28811
This commit is contained in:
Kara Erickson
2019-02-18 17:33:59 -08:00
committed by Igor Minar
parent ae16378ee7
commit a4638d5a81
26 changed files with 340 additions and 163 deletions

View File

@ -199,6 +199,7 @@ function convertToR3QueryMetadata(facade: R3QueryMetadataFacade): R3QueryMetadat
predicate: Array.isArray(facade.predicate) ? facade.predicate :
new WrappedNodeExpr(facade.predicate),
read: facade.read ? new WrappedNodeExpr(facade.read) : null,
static: facade.static
};
}