Kostia Sokolovskyi 66281ce520
[web] Remove all usages of js_util. (#171871)
Closes https://github.com/flutter/flutter/issues/143396

### Description
- Removes `js_util` library usage across the codebase

In order to get rid of `dart.library.js_util` in
[`kIsWeb`](e8d56b25c0/packages/flutter/lib/src/foundation/constants.dart (L83))
constant the dart analyzer has to be updated first. For now, the
`dart.library.js_util` value is hardcoded in the source code:
1a88edceb7/pkg/analyzer/lib/src/dart/constant/evaluation.dart (L2908-L2915).
So we either have to update this value or wait for the
https://github.com/dart-lang/sdk/issues/50045 fix.

## Pre-launch Checklist

- [X] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
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responsibilities.
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we expect every widget to implement].
- [X] I signed the [CLA].
- [X] I listed at least one issue that this PR fixes in the description
above.
- [ ] I updated/added relevant documentation (doc comments with `///`).
- [ ] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [X] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [X] All existing and new tests are passing.

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2025-07-16 16:00:58 +00:00
..

This directory contains tools and resources that the Flutter team uses during the development of the framework. The tools in this directory should not be necessary for developing Flutter applications, though of course, they may be interesting if you are curious.

The tests in this directory are run in the framework_tests_misc-* shards.