With this commit directives, components & pipes are standalone by default.
To be declared in an `NgModule`, those require now `standalone: false`.
PR Close#58169
This commit is part of the migration to standalone by default and sets up 2 files with a default value for standalone. They are still `false` in this case to land the change into G3 first. The switch to `true` will be executed in a follow-up PR.
PR Close#58175
For the HMR initializer block to support being used in a Vite setup with
import analysis, the import call expression needs to be a runtime generated
value and include the `@vite-ignore` special comment. Without the first,
Vite will error prior to loading the application. Without the second, a
warning will be shown for each import which is effectively each component
within the application when HMR is enabled.
PR Close#58173
The compiler's AST factories now support generating a dynamic import call
expression with either a string literal or an expression. The later is useful
for cases where the URL is dynamically created at runtime. Also, a leading
comment can now be added to the URL for cases where bundler behavior
needs to be included via special comments.
PR Close#58173
We're using `path.relative` to compute a relative path between a `SourceFile` and the one of the `rootDirs`. The problem is that the `rootDirs` get passed through `getCanonicalFileName` which lowercases the path in some platforms, while `SourceFile.fileName` is always case-insensitive. This yields a path outside of the project which we were ignoring.
This change passes the `SourceFile.fileName` before passing it through `path.relative` to ensure that we get a valid result.
PR Close#58150
Consider a template with a context variable `a`:
```
<ng-template let-a>{{this.a}}</ng-template>
```
t push -fAn interpolation inside that template to `this.a` should intuitively read the class variable `a`. However, today, it refers to the context variable `a`, both in the TCB and the generated code.
In this commit, the above interpolation now refers to the class field `a`.
BREAKING CHANGE: `this.foo` property reads no longer refer to template context variables. If you intended to read the template variable, do not use `this.`.
Fixes#55115
PR Close#55183
Whenever information is requested from the template checker right now,
the shim is only ensured to be generated for the single file/component.
This is slow in migrations where we don't want to collect diagnostics,
but rather request information from the component state.
This commit supports `OptimizeFor` in `checker#getTemplate`.
PR Close#58106
Currently we don't defer any symbols that have references outside of the `import` statement and the `imports` array. This is a bit too aggressive, because it's possible that the symbol is only used for types (e.g. `viewChild<SomeCmp>('ref')`) which will be stripped when emitting to JS.
These changes expand the logic so that references inside type nodes aren't considered.
**Note:** one special case is when the symbol used in constructor-based DI (e.g. `constructor(someCmp: SomeCmp)`, because these constructors will be compiled to `directiveInject` calls. We don't need to worry about them, because the compiler introduces an addition `import * as i1 from './some-cmp';` import that it uses to refer to the symbol.
Fixes#55991.
PR Close#58104
To ensure that the external runtime style component feature is correctly
emitted by the Angular compiler, compliance tests have been added for
file-based component styles. Additionally, the partial golden generator
has been updated to work with file-based component styles.
PR Close#57613
To provide support for HMR of inline component styles (`styles` decorator field), the AOT
compiler will now use the resource host transformation API with the Angular CLI to provide
external runtime stylesheet URLs when the `externalRuntimeStyles` compiler option is enabled.
This allows both a component's file-based and inline styles to be available for HMR when used
with a compatible development server such as with the Angular CLI. No behavioral change is
present if the `externalRuntimeStyles` option is not enabled or the resource host transformation
API is not used.
An `order` numeric field is also added to the transformation API which allows consumers such as
the Angular CLI to create identifiers for each inline style in a specific containing file.
PR Close#57613
The AOT compiler now has the capability to handle component stylesheet files as
external runtime files. External runtime files are stylesheets that are not embedded
within the component code at build time. Instead a URL path is emitted within a component's
metadata. When combined with separate updates to the shared style host and DOM renderer,
this will allow these stylesheet files to be fetched and processed by a development
server on-demand. This behavior is controlled by an internal compiler option `externalRuntimeStyles`.
The Angular CLI development server will also be updated to provide the serving functionality
once this capability is enabled. This capability enables upcoming features such as automatic
component style hot module replacement (HMR) and development server deferred stylesheet processing.
The current implementation does not affect the behavior of inline styles. Only the
behavior of stylesheet files referenced via component properties `styleUrl`/`styleUrls`
and relative template `link` elements are changed by enabling the internal option.
PR Close#57613
In order to investigate the performances of SSR, this commit introduces a benchmark suite which will measure several step of the rendering.
PR Close#57647
Some apps follow a pattern where they have an array of common declarations which is imported in most standalone components, but only some of the declarations are used. Such cases will currently raise the unused imports diagnostic but can be hard to fix, because it would require either removing declarations from the common array which can break other components, or copying only the necessary declarations from the array. Since neither of these solutions is great, this commit tweaks the logic for the diagnostic so that unused imports coming from _exported_ arrays are not reported (either from the same file or another one).
PR Close#57940
Add the `strictStandalone` flag to `angularCompilerOptions`. When set to
true, the compiler will require that all declarations of components,
directive, and pipes be standalone. When `standalone: false` is provided,
an error is raised.
Note that until the default value of the standalone flag is flipped, this
does not catch the case where a declaration does not specify a value for
`standalone`.
The default value of the `strictStandalone` flag is `false`.
PR Close#57935
The compiler and its file system implementation expects `fs.exists` to
return `true` even for directories. This caused issues with the TSConfig
resolution as `/` was looked up.
We fix this by making use of `stat` which is equally expensive to
`tree.exists`. The devkit tree's don't expose directory existance checks
out of the box.
Fixes#57887.
PR Close#57897
The visitor that all extended diagnostics are based on hadn't implemented the `visitIcu` method which meant that it wasn't detecting any code inside of them.
Fixes#57838.
PR Close#57845
Finalizes compiler implementation of the new `hydrate` triggers by:
* Reworking the logic that was depending on the `hydrateSpan` to distinguish hydrate triggers from non-hydrate triggers.
* Fixing that the `hydrate when` trigger didn't have a `hydrateSpan`.
* Adding an error if a parameter is passed into a `hydrate` trigger.
* Add an error if other `hydrate` triggers are used with `hydrate never`.
* Replacing the `prefetch` and `hydrate` flags in the template pipeline with a `modifiers` field.
* Fixing an error that was being thrown when reifying `hydrate` triggers in the pipeline.
* Adding quick info support for the `hydrate` keyword in the language service.
* Adding some tests for the new logic.
PR Close#57831
Whenever the `ngc` binary is used directly to parse configurations, we
should try to respect the configured file system like we do in all other
places. Right now one spot where we escape the FS is for reading
directories to e.g. support tsconfig#includes.
This commit fixes this, implementing TypeScript's read directory method
leveraging the configured FS. The approach taken here was used for a
couple of months/years for Angular Material migrations and no issues
were found.
PR Close#57805
Adds a new diagnostic that will report cases where a declaration is in the `imports` array, but isn't being used anywhere. The diagnostic is reported as a warning by default and can be controlled using the following option in the tsconfig:
```
{
"angularCompilerOptions": {
"extendedDiagnostics": {
"checks": {
"unusedStandaloneImports": "suppress"
}
}
}
}
```
**Note:** I'll look into a codefix for the language service in a follow-up.
Fixes#46766.
PR Close#57605
This commit changes the structure of the API extraction files to include all symbols used inside a package.
The structure is a `Map`, Symbol => package
eg: 'ApplicationRef' => '@angular/core'
PR Close#57346
in order for the docs to process function entry, this commit refactor function extraction by keeping the implementation as a the default entry and adds all the overloads into a separate array of entries.
PR Close#56489
This configures whether or not to preserve whitespace content when extracting messages from Angular templates in the legacy (View Engine) extraction pipeline.
This includes several bug fixes which unfortunately cannot be landed without changing message IDs in a breaking fashion and are necessary to properly trim whitespace. Instead these bug fixes are included only when the new flag is disabled.
PR Close#56507
Previously, the component handler was processing and resolving stylesheets
referenced via `styleUrl`/`styleUrls` multiple times when generating the
compiler metadata for components. The style resource information collection
for such styles has been further consolidated to avoid repeat resource loader
resolve calls which potentially could be expensive. Further optimization is
possible for the inline style case. However, inline styles here only require
AST traversal and no potentially expensive external resolve calls.
PR Close#57502
Previously, style elements within a template were used directly and not provided
to the optional transformation step that may be present on the resource host interface.
This causes such styles to not be processed by the Angular CLI's stylesheet pipeline
and could cause the styles to not work properly on all browsers. The style elements
are now processed in the same manner as inline styles within a component's metadata.
Link elements within a stylesheet were already being processed as `styleUrls`
equivalent and there is no behavior change in that regard.
PR Close#57429
Currently in some scenarios the compiler generates code like `null as any ? foo : bar` which will be invalid with [an upcoming TypeScript change](https://devblogs.microsoft.com/typescript/announcing-typescript-5-6-beta/#disallowed-nullish-and-truthy-checks). These changes switch to generating `0 as any` which is exempt from the change.
**Note:** I'm not starting the work to fully get us on TS 5.6 until the 18.2 release comes out, but this change is necessary to unblock an internal team.
PR Close#57303
Currently we use some short variable names like `t` and `r` in the generated factory functions. They can conflict with local symbols with the same names, if they're used for DI.
These changes rename the parameters to reduce the change for conflicts.
Fixes#57168.
PR Close#57181
This commit addresses a performance bottleneck in the `interpolatedSignalNotInvoked` extended
diagnostic by querying directive metadata instead of consulting the type-checker to determine if
a property binding corresponds with an input.
Fixes#57287
PR Close#57291
Similar to a previous fix that intended to make the JIT transforms
compatible with pre-transforms like e.g. Tsickle, we need to solve
an additional issue where the class properties are synthetic and result
in an `getSourceFile() => undefined` invocation that breaks the import
insertion, causing errors like:
```
TypeError: Cannot read properties of undefined (reading 'fileName')
```
PR Close#57262
