remove the following utilities used in unit tests which check for features
that are supported by all supported browsers:
- supportsCustomElements
- supportsWebAnimation
- supportsRegExUnicodeFlag
- supportsTemplateElement
also remove the following utilities which check for features that are
not supported (and aren't going to be) by any of the supported browsers:
- supportsDeprecatedCustomCustomElementsV0
- supportsDeprecatedShadowDomV0
PR Close#47543
apply different quality of life improvements to the shadow
css unit tests:
- refactor the tests so that they are nicely divided in multiple files
in a logical manner instead of having most of them all in a single big file
- remove the css normalization logic inconsistently used throughout the tests, which
causes tests to be inconsistent and it also introduced unintuitive checks
- provide a shared shim utility function (instead of re-defining it
multiple times)
- add a `toEqualCss` matcher that can be used in the tests in order to
match css strings without caring about spacing and indentation
PR Close#48443
The forms `submit` event handlers have a `return false` to prevent form submissions from reloading the page, however this also prevents the browser behavior for forms with `method="dialog"`.
These changes add an exception since the `method="dialog"` doesn't refresh the page.
Fixes#47150.
PR Close#47308
Currently whenever we insert element we do it directly on the node using `appendChild` or `insertBefore`, however this doesn't work with `<template>` elements where the `template.content` has to be used.
These changes add a few checks to call `appendChild` and `insertBefore` on the `content` of the template.
Fixes#15557.
PR Close#43429
Previously, browser_util would export a mutable `let` binding that was
initialized as a side-effect of `BrowserDetection.setup()`. This change
refactors the mutable binding into a `const` binding that is immediately
initialized in its initialized.
This is functionally equivalent, but makes it easier for module
optimizers such as Closure Compiler to track down side effects and prune
modules. It is also arguably cleaner to read (no worries about later
changes to the apparently mutable but effectively const binding).
PR Close#34207
When using ViewEncapsulation.ShadowDom, Angular will not remove the child nodes of the DOM node a root Component is bootstrapped into. This enables developers building Angular Elements to use the `<slot>` element to do native content projection.
PR Close#24861
