docs(ivy): update STATUS.md with compiler work breakdown (#22874)
PR Close #22874
This commit is contained in:
Misko Hevery
Matias Niemelä
parent
f88fba020b
commit
b524e4b142
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@ -0,0 +1,92 @@
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# Metadata storage in `.d.ts` files
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Currently angular stores metadata in `.metadata.json` files. This is problematic for several reasons:
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- Error prone (tools have to know how to work with them.)
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- Metadata does not follow import/exports.
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- Complicated to explain, maintain.
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- Hard for 3rd party contributors to add value.
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For Ivy we will be storing the metadata directly in `.d.ts` in the form of type information. This has several advantages:
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- TypeScript does most of the work of resolution
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- 3rd party developers already understand `.d.ts` as well as TypeScript type system.
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The key information which Ivy needs is the selector information. That is what pipe, component or directive has to be inserted at which location. These selector maps are declared in `@NgModule` annotations. Therefore the goal is to store: selectors and `@NgModule` import/exports rules.
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Let's assume that we have a file such as:
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```javascript
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@Pipe({ name: 'myPipe' })
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export class MyPipe { }
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@Component({ selector: `my-component` })
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export class MyComponent { }
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@Component({ selector: `[myDirective]` })
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export class MyDirective { }
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@NgModule({
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declarations: [MyDirective, MyPipe],
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exports: [MyDirective, MyPipe]
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})
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export class MyModule { }
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@NgModule({
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declarations: [MyComponent],
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imports: [MyModule],
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exports: [MyComponent],
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})
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export class MyAppModule { }
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```
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Then we can encode the selector information into the types as shown in this `.d.ts` file:
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```javascript
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export class MyPipe {
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static ngPipeDef: PipeDef<{type: MyPipe, selector: 'myPipe'}>;
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}
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export class MyComponent {
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static ngComponentDef: ComponentDef<{type: MyComponent, selector: 'my-component'}>;
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}
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export class MyDirective {
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static ngDirectiveDef: DirectiveDef<{type: MyDirective, selector: '[myDirective]'}>;
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}
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export class MyModule {
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static ngInjectorDef: InjectorDef<MyAppModule>;
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static ngModule = {
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type: MyModule,
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imports: [],
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exports: [MyDirective, MyPipe]
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};
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}
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export class MyAppModule {
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static ngModule = {
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type: MyAppModule,
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imports: [MyModule],
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exports: [MyComponent]
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};
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}
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```
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This means that `ngtsc` can extract selector information from `Program` by having TypeScript resolving the types and then doing walking the resolved AST. This would be equivalent to something like this in code:
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```javascript
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const MyComponent_selector /* inferred type: 'my-component' */ = getSelector(MyComponent);
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const MyDirective_selector /* inferred type: '[myDirective]' */ = getSelector(MyDirective);
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const MyPipe_selector /* inferred type: 'myPipe' */ = getSelector(MyPipe);
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const MyModule_exports /* inferred type: typeof MyDirective | typeof MyPipe */ =
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getNgModuleExports(MyModule);
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const MyAppModule_imports /* inferred type: typeof MyModule */ = getNgModuleImports(MyAppModule);
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const MyAppModule_transitive_imports /* inferred type: typeof MyDirective | typeof MyPipe */ =
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getNgModuleExports(MyAppModule_imports);
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declare function getNgModuleExports<T>(module: {ngModule: {exports: T[]}}): T;
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declare function getNgModuleImports<T>(module: {ngModule: {imports: T[]}}): T;
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declare function getSelector<T>(componentType: {
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ngComponentDef?: ComponentDef<{selector: T}>,
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ngDirectiveDef?: DirectiveDef<{selector: T}>,
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ngPipeDef?: PipeDef<{selector: T}>,
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}): T;
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````
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@ -8,7 +8,79 @@ We currently expect Ivy to remain behind the flag until it's feature complete an
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# Implementation Status
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# Implementation Status
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## Annotations
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The work can be divided into three categories:
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- `@angular/compiler-cli`: TypeScript transformer pipeline which includes two command line tools:
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- `ngtsc`: (Angular TypeScript Compiler) Angular compiler which strips out `@Component` (and friends) and replaces it with `defineComponent` (and friends).
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- `ngcc`: (Angular Compatibility Compiler) NPM upgrade compiler which reads the `.metadata.json` files and `.js` files and adds `defineComponent` (and friends) into the `node_module`. This in effect converts a pre-ivy module into ivy module.
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- `@angular/compiler`: Ivy Compiler which converts decorator into ivy
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- `@angular/core`: Decorators which can be patched with `@angular/compiler`.
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## `@angular/compiler-cli` changes
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### `ngtsc` TSC compiler transformer
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TSC transformer which removes and converts `@Pipe`, `@Component`, `@Directive` and `@NgModule`
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to the corresponding `definePipe`, `defineComponent`, `defineDirective` and `defineInjector`.
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- ❌ Basic setup of the transformer into `tsc`
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- ❌ Can read metadata from `.d.ts` (see: [METADATA.md](./METADATA.md))
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- ❌ Detect decorators and convert them to the `defineXXX` method using the `__Compiler` in `@angular/compiler`.
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- ❌ `@Pipe` => `definePipe`
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- ❌ `@Component` => `defineComponent`
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- ❌ `@Directive` => `defineDirective`
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- ❌ `@NgModule` => `defineInjector`
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- ❌ Encode selectors into `.d.ts` file.
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- ❌ `@Pipe` => see [METADATA.md](./METADATA.md)
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- ❌ `@Component` => see [METADATA.md](./METADATA.md)
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- ❌ `@Directive` => see [METADATA.md](./METADATA.md)
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- ❌ `@NgModule` => see [METADATA.md](./METADATA.md)
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- ❌ support `extends` for `@Pipe`, `@Component`, `@Directive` and `@NgModule`.
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- ❌ Documentation
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### `ngcc` Angular `node_module` compatibility compiler
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A tool which "upgrades" `node_module` compiled with non-ivy `ngc` into ivy compliant format.
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- ❌ Basic setup of stand alone executable
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- ❌ Integration with WebPack (cli)
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- ❌ Rewrite existing code by interpreting the associated metadata
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- ❌ `PipeCompiler`: `@Pipe` => `definePipe`
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- ❌ `DirectiveCompiler`: `@Directive` => `defineDirective`
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- ❌ `NgModuleCompiler`: `@NgModule` => `defineInjector`
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- ❌ `ComponentCompiler`: `@Component` => `defineComponent`
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- ❌ `TemplateCompiler`
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- ❌ `StyleCompiler`
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- ❌ Documentation
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## `@angular/compiler` changes
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- ❌ Component compilation: Translates `@Component` => `defineComponent`
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- ❌ `TemplateCompiler` (current known as `ViewCompiler`)
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- ❌ `StyleCompiler`
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- ❌ `PipeCompiler`: Translates `@Pipe` => `definePipe`
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- ❌ `DirectiveCompiler`: Translates `@Directive` => `defineDirective`
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- ❌ `InjectableCompiler`: Translates `@Injectable` => `defineInjectable`
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- ❌ `NgModuleCompiler`: Translates `@NgModule` => `defineInjector` (and `defineNgModule` only in jit)
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- ❌ Documentation
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## `@angular/core` changes
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The goal is for the `@Component` (and friends) to be the compiler of template. Since decorators are functions which execute during parsing of the `.js` file, the decorator can compile the template into Ivy. The AoT compiler's job is to remove the `@Component` and replace it with call to `defineComponent`.
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- ❌ Remove `createDecorator` (and friends) since we no longer support other modes.
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- ❌ `@angular/compiler` can patch itself onto:
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- ❌ `@Injectable`
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- ❌ `@NgModule`
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- ❌ `@Pipe`
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- ❌ `@Directive`
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- ❌ `@Component`
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- ❌ `ResourceLoader.resolved: Promise<>` Returns true if all `templateUrl`s and `styleUrl` have been resolved and application is ready to be bootstrapped.
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# Crosscutting
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## Decorators
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| Annotation | `defineXXX()` | Run time | Spec | Compiler | Back Patch |
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| Annotation | `defineXXX()` | Run time | Spec | Compiler | Back Patch |
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| -------------------- | ------------------------------ | ------- | -------- | -------- | -------- |
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| -------------------- | ------------------------------ | ------- | -------- | -------- | -------- |
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| `@Component` | ✅ `defineComponent()` | ✅ | ✅ | ✅ | ❌ |
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| `@Component` | ✅ `defineComponent()` | ✅ | ✅ | ✅ | ❌ |
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@ -31,86 +103,6 @@ We currently expect Ivy to remain behind the flag until it's feature complete an
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## Life Cycle Hooks
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| Feature | Runtime | Spec | Compiler |
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| ------------------------- | ------- | -------- | -------- |
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| `onChanges()` | ✅ | ✅ | ✅ |
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| `onDestroy()` | ✅ | ✅ | ✅ |
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| `onInit()` | ✅ | ✅ | ✅ |
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| `onChanges()` | ✅ | ✅ | ✅ |
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| `doCheck()` | ✅ | ✅ | ✅ |
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| `afterViewChecked()` | ✅ | ✅ | ✅ |
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| `afterViewInit()` | ✅ | ✅ | ✅ |
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| `afterContentChecked()` | ✅ | ✅ | ✅ |
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| `afterContentInit()` | ✅ | ✅ | ✅ |
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| listener teardown | ✅ | ✅ | ✅ |
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## Template Syntax
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| Feature | Runtime | Spec | Compiler |
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| -------------------------------- | ------- | -------- | -------- |
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| `<div>` | ✅ | ✅ | ✅ |
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| `<div>{{exp}}</div>` | ✅ | ✅ | ✅ |
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| `<div attr=value>` | ✅ | ✅ | ✅ |
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| `<div (click)="stmt">` | ✅ | ✅ | ✅ |
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| `<div #foo>` | ✅ | ✅ | ✅ |
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| `<div #foo="bar">` | ✅ | ✅ | ✅ |
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| `<div [value]="exp">` | ✅ | ✅ | ✅ |
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| `<div title="Hello {{name}}!">` | ✅ | ✅ | ✅ |
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| `<div [attr.value]="exp">` | ✅ | ✅ | ❌ |
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| `<div class="literal">` | ✅ | ✅ | ✅ |
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| `<div [class]="exp">` | ❌ | ❌ | ❌ |
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| `<div [class.foo]="exp">` | ✅ | ✅ | ❌ |
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| `<div style="literal">` | ✅ | ✅ | ✅ |
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| `<div [style]="exp">` | ❌ | ❌ | ❌ |
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| `<div [style.foo]="exp">` | ✅ | ✅ | ❌ |
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| `{{ ['literal', exp ] }}` | ✅ | ✅ | ✅ |
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| `{{ { a: 'literal', b: exp } }}` | ✅ | ✅ | ✅ |
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| `{{ exp \| pipe: arg }}` | ✅ | ✅ | ✅ |
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## `@Query`
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| Feature | Runtime | Spec | Compiler |
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| ------------------------------- | ------- | -------- | -------- |
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| `@Query(descendants)` | ✅ | ✅ | n/a |
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| `@Query(one)` | ✅ | ✅ | n/a |
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| `@Query(read)` | ✅ | ✅ | n/a |
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| `@Query(selector)` | ✅ | ✅ | n/a |
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| `@Query(Type)` | ✅ | ✅ | n/a |
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| `@ContentChildred` | ✅ | ✅ | ❌ |
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| `@ContentChild` | ✅ | ✅ | ✅ |
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| `@ViewChildren` | ✅ | ✅ | ❌ |
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| `@ViewChild` | ✅ | ✅ | ✅ |
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## Content Projection
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| Feature | Runtime | Spec | Compiler |
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| ------------------------------- | ------- | -------- | -------- |
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| `<ng-content>` | ✅ | ✅ | ✅ |
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| `<ng-content selector="...">` | ✅ | ✅ | ✅ |
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| container `projectAs` | ✅ | ✅ | ❌ |
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## Injection Features
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| Feature | Runtime | Spec | Compiler |
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| ----------------------------------- | ------- | -------- | -------- |
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| `inject(Type)` | ✅ | ✅ | ✅ |
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| `directiveInject(Type)` | ✅ | ✅ | ❌ |
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| `inject(Type, SkipSelf)` | ❌ | ❌ | ❌ |
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| `attribute('name')` | ✅ | ✅ | ❌ |
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| `injectChangeDetectionRef()` | ✅ | ✅ | ❌ |
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| `injectElementRef()` | ✅ | ✅ | ✅ |
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| `injectViewContainerRef()` | ✅ | ✅ | ✅ |
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| `injectTemplateRef()` | ✅ | ✅ | ✅ |
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| default `inject()` with no injector | ❌ | ❌ | ❌ |
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| sanitization with no injector | ✅ | ✅ | ❌ |
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## Change Detection
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## Change Detection
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| Feature | Runtime |
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| Feature | Runtime |
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| ----------------------------------- | ------- |
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| ----------------------------------- | ------- |
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@ -131,11 +123,90 @@ We currently expect Ivy to remain behind the flag until it's feature complete an
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| ----------------------------------- | ------- |
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| ----------------------------------- | ------- |
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| `renderComponent()` | ✅ |
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| `renderComponent()` | ✅ |
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| `getHostElement()` | ✅ |
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| `getHostElement()` | ✅ |
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| `createInjector()` | ❌ |
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| `createInjector()` | ✅ |
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## Template Compiler
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### Template Syntax
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| Feature | Runtime | Spec | Compiler |
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| --------------------------------------- | ------- | -------- | -------- |
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| `<div>` | ✅ | ✅ | ✅ |
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| `<div>{{exp}}</div>` | ✅ | ✅ | ✅ |
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| `<div attr=value>` | ✅ | ✅ | ✅ |
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| `<div (click)="stmt">` | ✅ | ✅ | ✅ |
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| `<div #foo>` | ✅ | ✅ | ✅ |
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| `<div #foo="bar">` | ✅ | ✅ | ✅ |
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| `<div [value]="exp">` | ✅ | ✅ | ✅ |
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| `<div title="Hello {{name}}!">` | ✅ | ✅ | ✅ |
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| `<div [attr.value]="exp">` | ✅ | ✅ | ❌ |
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| `<div class="literal">` | ✅ | ✅ | ✅ |
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| `<div [class]="exp">` | ❌ | ❌ | ❌ |
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| `<div [class.foo]="exp">` | ✅ | ✅ | ❌ |
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| `<div style="literal">` | ✅ | ✅ | ✅ |
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| `<div [style]="exp">` | ❌ | ❌ | ❌ |
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| `<div [style.foo]="exp">` | ✅ | ✅ | ❌ |
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| `{{ ['literal', exp ] }}` | ✅ | ✅ | ✅ |
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| `{{ { a: 'literal', b: exp } }}` | ✅ | ✅ | ✅ |
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| `{{ exp \| pipe: arg }}` | ✅ | ✅ | ✅ |
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| `<svg:g svg:p>` | ❌ | ❌ | ❌ |
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| `<img src=[userData]>` sanitization | ❌ | ❌ | ❌ |
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### Life Cycle Hooks
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| Feature | Runtime | Spec | Compiler |
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| ------------------------- | ------- | -------- | -------- |
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| `onChanges()` | ✅ | ✅ | ✅ |
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| `onDestroy()` | ✅ | ✅ | ✅ |
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| `onInit()` | ✅ | ✅ | ✅ |
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| `onChanges()` | ✅ | ✅ | ✅ |
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| `doCheck()` | ✅ | ✅ | ✅ |
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| `afterViewChecked()` | ✅ | ✅ | ✅ |
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| `afterViewInit()` | ✅ | ✅ | ✅ |
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| `afterContentChecked()` | ✅ | ✅ | ✅ |
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| `afterContentInit()` | ✅ | ✅ | ✅ |
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| listener teardown | ✅ | ✅ | ✅ |
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## I18N
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### `@Query`
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| Feature | Runtime | Spec | Compiler |
|
||||||
|
| ------------------------------- | ------- | -------- | -------- |
|
||||||
|
| `@Query(descendants)` | ✅ | ✅ | n/a |
|
||||||
|
| `@Query(one)` | ✅ | ✅ | n/a |
|
||||||
|
| `@Query(read)` | ✅ | ✅ | n/a |
|
||||||
|
| `@Query(selector)` | ✅ | ✅ | n/a |
|
||||||
|
| `@Query(Type)` | ✅ | ✅ | n/a |
|
||||||
|
| `@ContentChildred` | ✅ | ✅ | ❌ |
|
||||||
|
| `@ContentChild` | ✅ | ✅ | ✅ |
|
||||||
|
| `@ViewChildren` | ✅ | ✅ | ❌ |
|
||||||
|
| `@ViewChild` | ✅ | ✅ | ✅ |
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
### Content Projection
|
||||||
|
| Feature | Runtime | Spec | Compiler |
|
||||||
|
| ------------------------------- | ------- | -------- | -------- |
|
||||||
|
| `<ng-content>` | ✅ | ✅ | ✅ |
|
||||||
|
| `<ng-content selector="...">` | ✅ | ✅ | ✅ |
|
||||||
|
| container `projectAs` | ✅ | ✅ | ❌ |
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
### Injection Features
|
||||||
|
| Feature | Runtime | Spec | Compiler |
|
||||||
|
| ----------------------------------- | ------- | -------- | -------- |
|
||||||
|
| `inject(Type)` | ✅ | ✅ | ✅ |
|
||||||
|
| `directiveInject(Type)` | ✅ | ✅ | ❌ |
|
||||||
|
| `inject(Type, SkipSelf)` | ❌ | ❌ | ❌ |
|
||||||
|
| `attribute('name')` | ✅ | ✅ | ❌ |
|
||||||
|
| `injectChangeDetectionRef()` | ✅ | ✅ | ❌ |
|
||||||
|
| `injectElementRef()` | ✅ | ✅ | ✅ |
|
||||||
|
| `injectViewContainerRef()` | ✅ | ✅ | ✅ |
|
||||||
|
| `injectTemplateRef()` | ✅ | ✅ | ✅ |
|
||||||
|
| default `inject()` with no injector | ❌ | ❌ | ❌ |
|
||||||
|
| sanitization with no injector | ✅ | ✅ | ❌ |
|
||||||
|
|
||||||
|
|
||||||
|
### I18N
|
||||||
| Feature | Runtime | Spec | Compiler |
|
| Feature | Runtime | Spec | Compiler |
|
||||||
| ----------------------------------- | ------- | -------- | -------- |
|
| ----------------------------------- | ------- | -------- | -------- |
|
||||||
| translate text literals | ❌ | ❌ | ❌ |
|
| translate text literals | ❌ | ❌ | ❌ |
|
||||||
|
|
@ -143,10 +214,17 @@ We currently expect Ivy to remain behind the flag until it's feature complete an
|
||||||
| ICU | ❌ | ❌ | ❌ |
|
| ICU | ❌ | ❌ | ❌ |
|
||||||
|
|
||||||
|
|
||||||
|
### View Encapsulation
|
||||||
|
| Feature | Runtime | Spec | Compiler |
|
||||||
|
| ----------------------------------- | ------- | -------- | -------- |
|
||||||
|
| Render3.None | ✅ | ✅ | ✅ |
|
||||||
|
| Render2.None | ✅ | ✅ | ✅ |
|
||||||
|
| Render2.Emulated | ❌ | ❌ | ❌ |
|
||||||
|
| Render2.Native | ❌ | ❌ | ❌ |
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
## `______Ref`s
|
### `______Ref`s
|
||||||
| Method | View Container Ref | Template Ref | Embeded View Ref | View Ref | Element Ref | Change Detection Ref |
|
| Method | View Container Ref | Template Ref | Embeded View Ref | View Ref | Element Ref | Change Detection Ref |
|
||||||
| ---------------------- | ------------------ | ------------ | ---------------- | -------- | ----------- | -------------------- |
|
| ---------------------- | ------------------ | ------------ | ---------------- | -------- | ----------- | -------------------- |
|
||||||
| `clear()` | ❌ | n/a | n/a | n/a | n/a | n/a |
|
| `clear()` | ❌ | n/a | n/a | n/a | n/a | n/a |
|
||||||
|
|
@ -165,8 +243,3 @@ We currently expect Ivy to remain behind the flag until it's feature complete an
|
||||||
| `checkNoChanges()` | n/a | n/a | ❌ | n/a | n/a | ✅ |
|
| `checkNoChanges()` | n/a | n/a | ❌ | n/a | n/a | ✅ |
|
||||||
| `reattach()` | n/a | n/a | ❌ | n/a | n/a | ✅ |
|
| `reattach()` | n/a | n/a | ❌ | n/a | n/a | ✅ |
|
||||||
| `nativeElement()` | n/a | n/a | n/a | n/a | ✅ | n/a |
|
| `nativeElement()` | n/a | n/a | n/a | n/a | ✅ | n/a |
|
||||||
|
|
||||||
## Missing Pieces
|
|
||||||
- Sanitization ✅
|
|
||||||
- Back patching in tree shakable way. ❌
|
|
||||||
- attribute namespace ❌
|
|
||||||
Loading…
Reference in New Issue