Adds a test to the nullish coalescing diagnostic check to serve as
self-documentation on how it works with nullish coalescing on pipes that
are often misconfigured.
This also removes that non null assertion operator, which is incorrect
because there _are_ situations where a symbol cannot be retrieved.
PR Close#43419
Currently the compiler has three different classes to represent a "call to something":
1. `MethodCall` - `foo.bar()`
2. `SafeMethodCall` - `foo?.bar()`.
3. `FunctionCall` - Any calls that don't fit into the first two classes. E.g. `foo.bar()()`.
There are a few problems with this approach:
1. It is inconistent with the TypeScript AST which only has one node: `CallExpression`.
2. It means that we have to maintain more code, because the various parts of the compiler need to know about three node types.
3. It doesn't allow us to easily implement some new JS features like safe calls (e.g. `foo.bar?.())`).
These changes rework the compiler so that it produces only one node: `Call`. The new node behaves similarly to the TypeScript `CallExpression` whose `receiver` can be any expression.
There was a similar situation in the output AST where we had an `InvokeMethodExpression` and `InvokeFunctionExpression`. I've combined both of them into `InvokeFunctionExpression`.
PR Close#42882
The previous replacement logic would not account for the CRLF line
endings when applying replacements because it would replace the whole
template with `template.content.length` which would not account for
CRLF. This update applies individual expression edits at each location
in the template rather than attempting to replace the whole template
contents with a new string that contains the migrations.
fixes#43416
PR Close#43519
The migration was previously touching files that did not have any
expressions to migrate. This change ensures that the migration doesn't
commit any updates on files that do not need them.
This change, however, does not address the underlying issue with the
migration and CRLF (which is fixed in a follow-up change).
Related to #43416
PR Close#43519
This bit of code is problematic for several reasons:
1. AngularJS-specific handling should not exist in core router code if it can be avoided.
It's not something that should complicated the code long-term
2. It causes URL flickering (the `replace: /` really does happen and can be observed)
3. The original intent was likely for the URL to not actually change;
since the Router only initially supported 'deferred' navigations, this would _usually_ be the case.
4. It actually causes observers of URL changes more problems in handling changes
because the router is already about to process another navigation request.
Notice that when using `'computed'` restoration logic, we do not reset the URL
because it would cause another location change event and conflict with the new navigation.
5. It only resets the browser URL but does nothing to sync the rest of the internal state of the router.
6. It makes guards which call `router.navigate()` behave _slightly_ differently
than guard which return `UrlTree`. Guards which return `UrlTree` do not reset the
URL, but instead just trigger a new navigation.
7. It resets the entire URL rather than just the portion that the
`UrlHandlingStrategy` is configured to handle. Theoretically, the
Router could be configured to only handle a part of the URL so failed
navigations should not reset parts it is not configured to touch.
Note that this is actually a problem in other places in the router as
well where `resetState` is not called before
`resetUrlToCurrentUrlTree`.
As a nice benefit, when `urlUpdateStrategy` is set to `'eager'`, this
makes #17004 possible.
BREAKING CHANGE:
The router will no longer replace the browser URL when a new navigation
cancels an ongoing navigation. This often causes URL flicker and was
only in place to support some AngularJS hybrid applications. Hybrid
applications which rely on the `navigationId` being present on initial
navigations that were handled by the Angular router should instead
subscribe to `NavigationCancel` events and perform the
`location.replaceState` themselves to add `navigationId` to the Router
state.
In addition, tests which assert `urlChanges` on the `SpyLocation` may
need to be adjusted to account for the `replaceState` which is no longer
triggered.
PR Close#43496
The template type-checker has to emit type constructors for the
directives that are used in a template, where a type constructor's
declaration has to mirror the type parameter constraints as they were
originally declared. Therefore, the compiler analyzes whether a type
parameter constraint can be recreated, e.g. by generating imports for
any type references. Some type references cannot be recreated, in which
case the compiler has to fall back to a strategy where the type
constructor is created inline in the original source file (which comes
with a performance penalty).
There used to be an issue for type references to namespaced declarations.
The compiler is unable to emit such references such that an inline
type constructor should be used as fallback, but this did not happen.
This caused the attempt to emit the type reference to fail, as the
namespaced declaration cannot be located by the reference emitters.
This commit fixes the issue by using a stricter check to determine if a
type parameter requires an inline type constructor. The TypeScript
reflection host's `isStaticallyExported` logic was expanded to work for
any declaration instead of just classes, as e.g. type declarations can
also be referenced in a type parameter constraint.
Closes#43383
PR Close#43511
The getTransition helper function ensures that urlAfterRedirects is assigned for when
the router does not process the previous or current URL. In this case, we would set
the browserUrlTree to be the urlAfterRedirects, which was initialized to be the browserUrlTree.
This is a no-op, so there's no need for the getTransition function at all.
PR Close#43436
These token interfaces will make it easier to reason about tokens in the
parser and in specs.
Previously, it was never clear what items could appear in the `parts`
array of a token given a particular `TokenType`. Now, each token interface
declares a labelled tuple for the parts, which helps to document the token
better.
PR Close#43132
Previously, the way templates were tokenized meant that we lost information
about the location of interpolations if the template contained encoded HTML
entities. This meant that the mapping back to the source interpolated strings
could be offset incorrectly.
Also, the source-span assigned to an i18n message did not include leading
whitespace. This confused the output source-mappings so that the first text
nodes of the message stopped at the first non-whitespace character.
This commit makes use of the previous refactorings, where more fine grain
information was provided in text tokens, to enable the parser to identify
the location of the interpolations in the original source more accurately.
Fixes#41034
PR Close#43132
The tests were checking that the source-span of parsed HTML nodes were
accurate, but they were not checking the span when it includes the
"leading trivia", which are given by the `fullStart` rather than `start`
location.
PR Close#43132
When it was tokenized, text content is split into parts that can include
interpolations and encoded entities tokens.
To make this information available to downstream processing, this commit
adds these tokens to the `Text` AST nodes, with suitable processing.
PR Close#43132
The lexer now splits encoded entity tokens out from text and attribute value tokens.
Previously encoded entities would be decoded and the decoded value would be
included as part of the text token of the surrounding text. Now the entities
have their own tokens. There are two scenarios: text and attribute values.
Previously the contents of `<div>Hello & goodbye</div>` would be a single
TEXT token. Now it will be three tokens:
```
TEXT: "Hello "
ENCODED_ENTITY: "&", "&"
TEXT: " goodbye"
```
Previously the attribute value in `<div title="Hello & goodbye">` would be
a single text token. Now it will be three tokens:
```
ATTR_VALUE_TEXT: "Hello "
ENCODED_ENTITY: "&", "&"
ATTR_VALUE_TEXT: " goodbye"
```
- ENCODED_ENTITY tokens have two parts: "decoded" and "encoded".
- ENCODED_ENTITY tokens are always preceded and followed by either TEXT tokens
or ATTR_VALUE_TEXT tokens, depending upon the context, even if they represent
an empty string.
The HTML parser has been modified to recombine these tokens to allow this
refactoring to have limited effect in this commit. Further refactorings
to use these new tokens will follow in subsequent commits.
PR Close#43132
The lexer now splits interpolation tokens out from text tokens.
Previously the contents of `<div>Hello, {{ name}}<div>` would be a single
text token. Now it will be three tokens:
```
TEXT: "Hello, "
INTERPOLATION: "{{", " name", "}}"
TEXT: ""
```
- INTERPOLATION tokens have three parts, "start marker", "expression"
and "end marker".
- INTERPOLATION tokens are always preceded and followed by TEXT tokens,
even if they represent an empty string.
The HTML parser has been modified to recombine these tokens to allow this
refactoring to have limited effect in this commit. Further refactorings
to use these new tokens will follow in subsequent commits.
PR Close#43132
Previously, the regular expression used by the compiler's ShadowDOM CSS
shim to strip comments from CSS text was susceptible to [catastrophic
backtracking][1], which could lead to exponential (O(2^n)) increase in
complexity/execution time. More specifically, this would be triggered if
the processed text contained an unterminated comment with lots of
leading whitespace (i.e. `/*`, followed by lots of whitespace characters
and no closing `*/`).
Although such input is unlikely in real-world scenarios, this commit
improves the regular expression to not be susceptible to this issue.
[1]: https://www.regular-expressions.info/catastrophic.html
PR Close#43456
No test was added for this case because I can't think of a test case to
write that would work.
This change updates the code for a consistent mental model of setting
the `browserUrlTree`. It's only meant to track the `UrlTree` that the
`UrlHandlingStrategy` is set to extract, not the full `rawUrl`. Notice
that everywhere else, the `browserUrlTree` is set to
`urlAfterRedirects`, which is computed based on the extracted URL, _not_
the `rawUrl`.
PR Close#43426
PR #43102 broke some use-cases. These tests document expected behavior
and would have prevented #43446 and #43447. Recent changes have already
addressed these issues, but it would still be a good idea to cover these
use-cases in tests as well.
PR Close#43449
The previous code would set the browser URL to be only the part that's
extracted by the `UrlHandlingStrategy`. However, there may be parts of
the URL which are _should not_ be handled by the Angular Router. This
change updates the code to set the browser URL in the same way that's
done with `'deferred'`: Merging the extracted URL after redirects with
the whole raw URL of the navigation, which includes parts not handled by
the `UrlHandlingStrategy`.
PR Close#43421
There are situations where the Router does not currently clean up failed navigations
correctly. While this is problematic on its own, we can mitigate some of
the damage by processing any URL when we get a navigation request when
the internal router state is out of sync.
Each of the added tests would fail without this change.
fixes#34795
PR Close#43424
Introduce two new bazel rules: tsec_test and tsec_config, for
describing the tsec checks and the tsconfig file needed for such
checks, respectively. Currently, tsec_test only checks the srcs
of a ts_library or ng_module. It does not check direct or transitive
dependencies. Also, tsconfig files need to be manually maintained
to make sure tsec can read all necessary input (including global
symbols).
PR Close#43108
tsec is a static analyzer that discovers Trusted Types violations.
Deploy tsec to make sure there will be no TT regression in several
critical packages, including core, platform-browser, platform-server
and their dependencies. Existing violations have been reviewed and
exempted in packages/tsec-exemption.json. Future changes to the
exemption list requires security review.
PR Close#43108
* Document `currentUrlTree`, `browserUrlTree`, and `rawUrlTree`
* Add a couple `TODO` comments to investigate changes based on understanding
PR Close#43391
This restores the `finalize` function to directly call
`resetUrlToCurrentUrlTree`, as it was before efb440eb2f.
This allows us to simplify the `restoreHistory` function because it no
longer needs to handle the call from `finalize` where it should not
reset the internal router state.
PR Close#43382
With the merging of #41730, our tests now more closely emulate real
browser behavior. This means that we can make changes to the `Router` which depend
on actual browser behavior rather than incorrectly mocked test behavior.
This change updates the logic in the `Router` to only trigger
navigations on `popstate` events. Since our `SpyLocation` now triggers
the `popstate` event correctly on `simulateHashChange`, `back`,
`forward`, and `simulatePopState`, we are able to rely on this being
true for all of these navigations in tests when using `SpyLocation` (the
default for `RouterTestingModule`).
In addition, this behavior relies on documented browser behavior: The
`popstate` event happens due to browser transitions as a result of user
triggered "back" button or otherwise.
https://developer.mozilla.org/en-US/docs/Web/API/Window/popstate_event#when_popstate_is_sent
In addition, this change chooses `popstate` over `hashchange` because it
is the event that is already being used for navigations since the
documented behavior of browsers is that `popstate` happens before
`hashchange`.
fixes#41782
PR Close#43328
With this change we change the logic to locate the tsconfig files. The public API to locate, read and parse the workspace configuration should be use instead of the custom implemented logic.
The custom implemented logic depended on methods which have long been deprecated and are not removed in version 13 of the Angular CLI. This was not caught during development/UT because this repo is using outdated Angular Tooling packages.
This change also updates a number of spec files which previously creating an invalid Angular workspace configuration file.
Closes#43334
PR Close#43343
The TODO comment suggesting to verify that the target element to
scroll to needs to be an anchor does not longer seems under consideration
so it can be removed
resolves#43348
PR Close#43378
Exposes implementation from #38884 as a public opt-in option.
From that commit:
> We can’t determine whether the user actually meant the back or
> the forward using the popstate event (triggered by a browser
> back/forward)
> so we instead need to store information on the state and compute the
> distance the user is traveling withing the browser history.
> So by using the History#go method,
> we can bring the user back to the page where he is supposed to be after
> performing the action.
Resolves#13586
PR Close#43289
* Do not emit url pop on Location.go
* Emit a `popstate` event before each `hashchange` to have the same
behavior of the browser.
* Track the url change in the internal history when calling `simulateHashChange`
The changes to the router tests reflect the goals of the test.
Generally when `Location.go` is used to trigger navigations, it is only
relevant for `HashLocationStrategy` and verifying that the Router picks
up changes from manual URL changes. To do this, we convert those calls
to `simulateHashChange` instead.
Manual URL bar changes to the path when not using the `HashLocationStrategy`
would otherwise trigger a full page refresh so they aren't relevant to
these test scenarios which assert correct behavior during the lifetime
of the router.
[Reference for no `popstate` on `pushState`/`replaceState`](https://developer.mozilla.org/en-US/docs/Web/API/Window/popstate_event)
> Note that just calling history.pushState() or history.replaceState() won't
trigger a popstate event. The popstate event will be triggered by doing a browser
action such as a click on the back or forward button (or calling history.back()
or history.forward() in JavaScript).
[Reference for `popstate` before `hashChange`](https://developer.mozilla.org/en-US/docs/Web/API/Window/popstate_event#when_popstate_is_sent)
> When the transition occurs, either due to the user triggering the browser's
> "Back" button or otherwise, the popstate event is near the end of the process to transition to the new location
...
> 12. If the value of state changed, the popstate event is sent to the document.
> 13. Any persisted user state is restored, if the browser chooses to do so.
> 14. If the original and new entry's shared the same document, but had different fragments in their URLs, send the hashchange event to the window.
BREAKING CHANGE:
The behavior of the `SpyLocation` used by the `RouterTestingModule` has changed
to match the behavior of browsers. It no longer emits a 'popstate' event
when `Location.go` is called. In addition, `simulateHashChange` now
triggers _both_ a `hashchange` and a `popstate` event.
Tests which use `location.go` and expect the changes to be picked up by
the `Router` should likely change to `simulateHashChange` instead.
Each test is different in what it attempts to assert so there is no
single change that works for all tests. Each test using the `SpyLocation` to
simulate browser URL changes should be evaluated on a case-by-case basis.
fixes#27059
PR Close#41730
When providing the completion for `SafePropertyRead`, the ts server
will not apply the optional chaining. So no need to shift the start
location of `replacementSpan` back.
PR Close#43321
Previously, the error message was not added to `Unhandled Navigation Error`
Before
```
main.js:1 Unhandled Navigation Errors:
```
After
```
main.js:1 Unhandled Navigation Errors: SecurityError: Failed to execute 'replaceState' on 'History': A history state object with URL 'http://localhost:4200/' cannot be created in a document with origin 'http://127.0.0.1:8080' and URL 'http://127.0.0.1:8080/'.
```
PR Close#43291
This commit adds a new output to `routerLinkActive` directive.
Whenever, the associated link becomes active or inactive, an
event will be fired on this out with the correct status
PR Close#37284
PR Close#43280
Daniel Díaz