The semantics for nullish coalescing (`??`) in Javascript/Typescript
differ slightly from the semantics in Angular templates. Mixing nullish
coalescing with logical and/or without parentheses is an error in
Javascript. This PR adds an extended diagnostic that can be enabled to
treat it as an error in Angular templates as well.
PR Close#60279
Improves the partial compliance golden generation to not rely on large
files being transmitted via `stdout`. Instead the files are written
directly as it's done in idiomatic Bazel generation actions.
In addition, we add extra stdout logging for the Bazel action, to see if
the process is actually invoked in RBE workers. Right now those are
occassionally stuck, but neither us, nor the RBE team can see anything
running, and they're occasionally stuck for 1hr.
PR Close#60427
Historically Angular's type checking only extended to templates, however host bindings can contain expressions as well which can have type checking issues of their own. These changes expand the type checking infrastructure to cover the `host` object literal, `@HostBinding` decorators and `@HostListener` with full language service support coming in future commits.
Note that initially the new functionality is disabled by default and has to be enabled using the `typeCheckHostBindings` compiler flag.
PR Close#60267
Sets up the logic that produces the information necessary to type check host bindings of a component. Also introduces a compiler flag for toggling checking of host bindings.
PR Close#60267
Instead of relying on Microsoft's API extractor for `d.ts` bundling,
we are switching to Rollup-based `.d.ts` bundling.
This allows us to support code spliting, even for `.d.ts` files,
allowing for relative imports to be used between entry-points, without
ending up duplicating `.d.ts` definitions in two files. This would otherwise cause
problems with assignability of types.
It also nicely integrates into our existing rollup configuration, and
overall simplifies the `ng_package` rule even further!
Notably `tsup` also uses this rollup plugin, and it seems to work well.
Keep in mind that Microsoft's API extractor is pretty hard to integrate,
caused many problems in the past, and isn't capable of code splitting.
This aligns our d.ts bundling with the .mjs bundling (great alignment).
PR Close#60321
We had several places where we were trying to get the source file of a class for which we're generating HMR-related code. These calls will fail if the class was transformed so we have to get its source file through the original node.
Fixes#60287.
PR Close#60298
A build will still fail in this case. However, for the language service,
this allows the component to exist in the compiler registry and prevents
cascading diagnostics within an IDE due to "missing" components. The
originating template related errors will still be reported in the IDE.
This case is particularly important when a template file either does
not exist or is inaccessible to the language service.
PR Close#58673
Now that the expression AST contains parenthesized expressions, this
refactors the template pipeline to strip out the ones we don't need.
PR Close#60169
Following up on #60127 which added the concept of a parenthesized
expression to the output AST, this does the same for the expression AST.
PR Close#60169
Previously we never could use relative imports to import e.g. `Component`
in e.g. the `core/tests/bundling` folder. This was necessary because otherwise the
Angular compiler wouldn't process those files as it wouldn't recognize
the Angular decorator as the one from `@angular/core`.
Notably this still isn't a large issue because relative imports still
work for most core tests, that are JIT compiled!
For bundling tests though, or some smaller targets, our new upcoming
guidelines for using relative imports inside the full package; fall
apart. This commit unblocks this effort and allows us to use relative
imports in all tests of `packages/core`. This is achieved by leveraging
the existing `isCore` functionality of the compiler, and fixing a few
instances that were missing before.
PR Close#60268
Currently only components can have resources, because they're the only symbol kinds being type checked. Since we want to add directives to it, these changes rework the resource handling to accommodate them.
PR Close#60191
Currently the `TemplateSourceManager` is set up to specifically cater to component templates. These changes make it more generic so we can reuse it for directives.
PR Close#60191
Currently a lot of the internal type checking data structures are set up specifically for components, because we only support type checking of templates. Since this will change in future commits, these changes prepare for it by renaming various methods and separating out component-specific data.
PR Close#60191
Narrows down the versions of TypeScript we need to support.
BREAKING CHANGE:
* TypeScript versions less than 5.8 are no longer supported.
PR Close#60197
This commit fixes a bug where nodes are reused across incremental
compilations. The source file's next template ID is lost because a new
source file is created but nodes may still be retained.
PR Close#60152
Instead of using a property on BinaryOperatorExpr / UnaryOperatorExpr,
introduce a ParenthesizedExpr which can be used to parenthesize any
expression.
PR Close#60127
Add support for the `void` operator in templates and host bindings.
This is useful when binding a listener that may return `false` and
unintentionally prevent the default event behavior.
Ex:
```
@Directive({
host: { '(mousedown)': 'void handleMousedown()' }
})
```
BREAKING CHANGE: `void` in an expression now refers to the operator
Previously an expression in the template like `{{void}}` referred to a
property on the component class. After this change it now refers to the
`void` operator, which would make the above example invalid. If you have
existing expressions that need to refer to a property named `void`,
change the expression to use `this.void` instead: `{{this.void}}`.
PR Close#59894
The CLI uses the `ts.transform` API to apply the Angular compiler's transformers
on the source files when `isolatedModules` is true (and various other constraints)
instead of going through a full `ts.Program.emit` operation. This results in the
transformers to operate in an environment where no emit resolver is available, which
was not previously accounted for. This commit reflects the possibility for the emit
resolver to be missing and handles this scenario accordingly.
Fixes#59837
PR Close#59869
Currently when we generate the tracking expression for a `@for` block, we process its expression in the context of the creation block. This is incorrect, because the expression may require ops of its own for cases like nullish coalescing or safe reads. The result is that while we do generate the correct variable, they're added to the creation block rather than the tracking function which causes an error at runtime.
These changes address the issue by keeping track of a separate set of ops for the `track` expression that are prepended to the generated function, similarly to how we handle event listeners.
Fixes#56256.
PR Close#58520
When the compiler analyzes the defer blocks in a component, it generates two sets of dependencies: ones specific for each block and others from all the deferred blocks within the component. The logic that combines all the defer block dependencies wasn't de-duplicating them which resulted in us producing `setClassMetadataAsync` calls where the callback can have multiple parameters with the same name. This was a problem both in full and partial compilation, but the latter was more visible, because Babel throws an error in such cases.
These changes add some logic to de-duplicate the dependencies so that we produce valid code.
Fixes#59922.
PR Close#59926
Adjusts the code we generate for HMR so that it passes in the HMR ID and `import.meta` to the `replaceMetadata` call. This is necessary so we can do better logging of errors.
PR Close#59854
When we generate an HMR replacement function, we determine which locals from the file are used and we pass them by reference. This works fine in most cases, but breaks down for const enums which don't have a runtime representation.
These changes work around the issue by passing in all the values as an object literal.
Fixes#59800.
PR Close#59815
Fixes that the partial evaluator was interpreting initializer-less enum members as undefined. In this case the value is the same as the index.
PR Close#59815
Makes the following cleanups in the output AST:
* The `TemplateLiteral` and `TemplateLiteralElement` nodes have been renamed to `TemplateLiteralExpr` and `TemplateLiteralElementExpr` respectively for consistency and to avoid overlaps with the expression AST nodes.
* The `TemplateLiteralExpr` and `TemplateLiteralElementExpr` have been refactored to be `Expression`s for correctness. This involves updating some existing code.
* The `TaggedTemplateExpr` has been renamed to `TaggedTemplateLiteralExpr` for consistency.
PR Close#59230
