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

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This commit adds support for the `static: true` flag in `ContentChild`
queries. Prior to this commit, all `ContentChild` 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
@ContentChild(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 18:18:56 -08:00
committed by Igor Minar
parent a4638d5a81
commit 3c1a1620e3
10 changed files with 261 additions and 50 deletions
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1
packages/compiler/src/render3/r3_identifiers.ts
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@ -187,6 +187,7 @@ export class Identifiers {
static queryRefresh: o.ExternalReference = {name: 'ɵqueryRefresh', moduleName: CORE};
static viewQuery: o.ExternalReference = {name: 'ɵviewQuery', moduleName: CORE};
static staticViewQuery: o.ExternalReference = {name: 'ɵstaticViewQuery', moduleName: CORE};
static staticContentQuery: o.ExternalReference = {name: 'ɵstaticContentQuery', moduleName: CORE};
static loadViewQuery: o.ExternalReference = {name: 'ɵloadViewQuery', moduleName: CORE};
static contentQuery: o.ExternalReference = {name: 'ɵcontentQuery', moduleName: CORE};
static loadContentQuery: o.ExternalReference = {name: 'ɵloadContentQuery', moduleName: CORE};