Miško Hevery
parent
7fbeb04b7c
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9ebb4c02a2
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@ -11,7 +11,7 @@ We currently expect Ivy to remain behind the flag until it's feature complete an
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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 `.STORING_METADATA_IN_D.TS.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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- `ngcc`: (Angular Compatibility Compiler) NPM upgrade compiler which reads the `STORING_METADATA_IN_D.TS.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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@ -22,45 +22,31 @@ The work can be divided into three categories:
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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 STORING_METADATA_IN_D.TS from `.d.ts` (see: [STORING_METADATA_IN_D.TS.md](./STORING_METADATA_IN_D.TS.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 [STORING_METADATA_IN_D.TS.md](./STORING_METADATA_IN_D.TS.md)
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- ❌ `@Component` => see [STORING_METADATA_IN_D.TS.md](./STORING_METADATA_IN_D.TS.md)
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- ❌ `@Directive` => see [STORING_METADATA_IN_D.TS.md](./STORING_METADATA_IN_D.TS.md)
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- ❌ `@NgModule` => see [STORING_METADATA_IN_D.TS.md](./STORING_METADATA_IN_D.TS.md)
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- ❌ support `extends` for `@Pipe`, `@Component`, `@Directive` and `@NgModule`.
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- ✅ Basic setup of the transformer into `tsc`
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- ✅ Can read STORING_METADATA_IN_D.TS from `.d.ts` (see: [STORING_METADATA_IN_D.TS.md](./STORING_METADATA_IN_D.TS.md))
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- ✅ Detect decorators and convert them to the `defineXXX` method using the `__Compiler` in `@angular/compiler`.
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- ✅ Encode selectors into `.d.ts` file.
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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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- ✅ Basic setup of stand alone executable
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- ✅ Rewrite existing code by interpreting the associated STORING_METADATA_IN_D.TS
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- ❌ Integration with WebPack (cli)
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- ❌ Rewrite existing code by interpreting the associated STORING_METADATA_IN_D.TS
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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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- ✅ 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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@ -68,40 +54,39 @@ A tool which "upgrades" `node_module` compiled with non-ivy `ngc` into ivy compl
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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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- ✅ `@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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# Testing / Debugging
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- ❌ in debug mode publish components into DOM nodes for easier debugging.
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- ✅ in debug mode publish components into DOM nodes for easier debugging.
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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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| -------------------- | ------------------------------ | ------- | -------- | -------- | -------- |
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| `@Component` | ✅ `defineComponent()` | ✅ | ✅ | ✅ | ❌ |
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| `@Directive` | ✅ `defineDirective()` | ✅ | ✅ | ✅ | ❌ |
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| `@Directive` | ❌ `defineAbstractDirective()` | ❌ | ❌ | ❌ | ❌ |
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| `@Pipe` | ✅ `definePipe()` | ✅ | ✅ | ✅ | ❌ |
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| `@Injectable` | ✅ `defineInjectable()` | ✅ | ❌ | ❌ | ❌ |
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| `@NgModule` | ✅ `defineInjector()` | ✅ | ❌ | ❌ | ❌ |
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| `@ConfigureInjector` | ❌ `defineInjector()` | ❌ | ❌ | ❌ | ❌ |
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| Annotation | `defineXXX()` | Run time | Spec | Compiler |
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| -------------------- | ------------------------------ | ------- | -------- | -------- |
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| `@Component` | ✅ `defineComponent()` | ✅ | ✅ | ✅ |
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| `@Directive` | ✅ `defineDirective()` | ✅ | ✅ | ✅ |
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| `@Directive` | ✅ `defineBase()` | ✅ | ✅ | ✅ |
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| `@Pipe` | ✅ `definePipe()` | ✅ | ✅ | ✅ |
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| `@Injectable` | ✅ `defineInjectable()` | ✅ | ✅ | ✅ |
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| `@NgModule` | ✅ `defineInjector()` | ✅ | ✅ | ✅ |
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| `@ConfigureInjector` | ✅ `defineInjector()` | ❌ | ❌ | ❌ |
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## Component Composition
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| Feature | Runtime | Spec | Compiler |
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| ---------------------------------------- | ------- | -------- | -------- |
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| creation reordering based on injection | ❌ | ❌ | ✅ |
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| `class CompA extends CompB {}` | ❌ | ❌ | ❌ |
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| `class CompA extends CompB { @Input }` | ❌ | ❌ | ❌ |
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| `class CompA extends CompB { @Output }` | ❌ | ❌ | ❌ |
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| creation reordering based on injection | ✅ | ✅ | ✅ |
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| `class CompA extends CompB {}` | ✅ | ✅ | ✅ |
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| `class CompA extends CompB { @Input }` | ✅ | ✅ | ✅ |
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| `class CompA extends CompB { @Output }` | ✅ | ✅ | ✅ |
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@ -147,16 +132,12 @@ The goal is for the `@Component` (and friends) to be the compiler of template. S
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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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| `<div xmlns:foo="url" foo:bar="baz">` <br/>Compiler still needs to be updated to process templates with namespaced attributes. ([see #24386](https://github.com/angular/angular/pull/24386)) | ✅ | ✅ | ❌ |
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| `<div xmlns:foo="url" foo:bar="baz">` | ✅ | ✅ | ✅ |
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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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| `<div (nocd.click)>` | ❌ | ❌ | ❌ |
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| `<div (bubble.click)>` | ❌ | ❌ | ❌ |
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| `<div (keyup.enter)>` | ❌ | ❌ | ❌ |
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| `<div (hammer.js)>` | ❌ | ❌ | ❌ |
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| `<img src=[userData]>` sanitization | ✅ | ✅ | ✅ |
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| [`<div (directiveOut)>`][gh23560] | ✅ | ✅ | ✅ |
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| [`<ng-template (directiveOut)>`][gh23561] | ✅ | ✅ | ✅ |
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| [`<ng-container>`][gh24381] | ✅ | ✅ | ✅ |
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@ -189,10 +170,10 @@ The goal is for the `@Component` (and friends) to be the compiler of template. S
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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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| `@ContentChildren` | ✅ | ✅ | ❌ |
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| `@ContentChildren` | ✅ | ✅ | ✅ |
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| `@ContentChild` | ✅ | ✅ | ✅ |
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| `@ViewChildren` | ✅ | ✅ | ❌ |
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| `@ViewChild` | ✅ | ✅ | ❌ |
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| `@ViewChildren` | ✅ | ✅ | ✅ |
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| `@ViewChild` | ✅ | ✅ | ✅ |
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@ -201,7 +182,7 @@ The goal is for the `@Component` (and friends) to be the compiler of template. S
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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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| container `ngProjectAs` | ✅ | ✅ | ✅ |
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@ -209,22 +190,22 @@ The goal is for the `@Component` (and friends) to be the compiler of template. S
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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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| `directiveInject(Type)` | ✅ | ✅ | ✅ |
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| `inject(Type, SkipSelf)` | ❌ | ❌ | ❌ |
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| `attribute('name')` | ✅ | ✅ | ❌ |
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| `injectChangeDetectionRef()` | ✅ | ✅ | ❌ |
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| `injectChangeDetectionRef()` | ✅ | ✅ | ✅ |
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| `injectElementRef()` | ✅ | ✅ | ✅ |
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| `injectViewContainerRef()` | ✅ | ✅ | ✅ |
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| `injectTemplateRef()` | ✅ | ✅ | ✅ |
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| `injectRenderer2()` | ✅ | ✅ | ✅ |
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| default `inject()` with no injector | ❌ | ❌ | ❌ |
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| sanitization with no injector | ✅ | ✅ | ❌ |
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| default `inject()` with no injector | ✅ | ✅ | ✅ |
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| sanitization with no injector | ✅ | ✅ | ✅ |
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### I18N
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| Feature | Runtime | Spec | Compiler |
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| ----------------------------------- | ------- | -------- | -------- |
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| translate text literals | ✅ | ✅ | ✅ |
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| translate text literals | ❌ | ❌ | ✅ |
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| rearrange text nodes | ❌ | ❌ | ❌ |
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| ICU | ❌ | ❌ | ❌ |
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@ -232,10 +213,10 @@ The goal is for the `@Component` (and friends) to be the compiler of template. S
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### View Encapsulation
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| Feature | Runtime | Spec | Compiler |
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| ----------------------------------- | ------- | -------- | -------- |
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| Renderer3.None | ✅ | ✅ | ✅ |
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| Renderer2.None | ✅ | ✅ | ✅ |
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| Renderer2.Emulated | ❌ | ❌ | ❌ |
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| Renderer2.Native | ❌ | ❌ | ❌ |
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| Renderer3.None | ✅ | ✅ | ✅ |
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| Renderer2.None | ✅ | ✅ | ✅ |
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| Renderer2.Emulated | ✅ | ✅ | ✅ |
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| Renderer2.Native | ✅ | ✅ | ✅ |
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@ -0,0 +1,57 @@
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# Storing Metadata in `.d.ts` files
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Previous version of Angular used `metadata.json` files to store information about directives/component/pipes/ng-modules.
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`ngc` compiler would than do a global analysis to generate the `.ngfactory.ts` files from the `metadata.json`.
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Ivy strives for locality, which means that `ngtsc` should not need any global information in order to compile the system.
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The above is mostly true.
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Unfortunately, in order for `ngtsc` to generate code which is tree shakable `ngtsc` does need to have global knowledge.
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Here is an abbreviated example of breakage of tree-shake-ability.
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```typescript
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@Directive({
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selector: '[tooltip]'
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})
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export class TooltipDirective {
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// ngtsc generates this:
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static ngDirectiveDef = defineDirective(...);
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}
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@Component({
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selector: 'my-app',
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template: 'Hello World!'
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})
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class MyAppComponent {
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// ngtsc generates this:
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static ngDirectiveDef = defineComponent({
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...
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directives: [
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// BREAKS TREE-SHAKING!!!
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// TooltipDirective included here because it was declared in the NgModule
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// ngtsc does not know it can be omitted.
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// Only way for ngtsc to know that it can omit TooltipDirective is if it knows
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// its selector and see if the selector matches the current component's template.
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TooltipDirective
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]
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});
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}
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@NgModule({
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declarations: [MyAppComponent, TooltipDirective],
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bootstrap: [MyAppComponent],
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})
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class MyAppModule {
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// ngtsc generates this:
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static ngDirectiveDef = defineNgModule(...);
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}
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```
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Notice that `ngtsc` can't remove `TooltipDirective` because it would need to know its selector and see if the directive matches in the component's template.
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Knowing the selector breaks locality and so we make an exception for some locality information such as selector, inputs and outputs.
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Since we are breaking the locality rule, we need to store the information someplace since `ngtsc` can't have access to the `TooltipDirective` source.
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We store the information in the `.d.ts` file like so.
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```typescript
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class TooltipDirective {
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static ngDirectiveDef: DirectiveDefWithMeta<TooltipDirective, '[tooltip]', '', {}, {}, []>
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}
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```
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Reference in New Issue