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GeezerVison is showing github.com — fix(core): boolean properties and class substring operators in attribute selectors by triniwiz · Pull Request #11529 · NativeScript/NativeScript

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@triniwiz

@triniwiz triniwiz commented Oct 15, 2026 •
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PR Checklist

  • The PR title follows our guidelines: https://github.com/NativeScript/NativeScript/blob/master/tools/notes/CONTRIBUTING.md#commit-messages.
  • There is an issue for the bug/feature this PR is for. To avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it.
  • You have signed the CLA.
  • All existing tests are passing: https://github.com/NativeScript/NativeScript/blob/master/tools/notes/DevelopmentWorkflow.md#running-unit-tests-application.
  • Tests for the changes are included - https://github.com/NativeScript/NativeScript/blob/master/tools/notes/WritingUnitTests.md.

What is the current behavior?

  • [attr] matches any non-null value. Every view has hidden, false by default, so [hidden] { display: none } from a CSS reset (Tailwind's preflight, Bootstrap's Reboot) hides the whole app.
  • Every attribute selector on class is turned into a class selector, whatever its operator: [class*='btn-'], [class^='col'] and [class='a b'] all behave like .btn-, .col, .a b.

What is the new behavior?

  • A boolean property is present for [attr] only while it is true, like an HTML boolean attribute. [hidden=false] still compares by value.
  • Only .x and [class~=x] are class matches. The other operators match the class attribute's text.

Tests: css-selector.spec.ts (4).

Verified with all of these core PRs merged together (#11527–#11537): apps/automated passes on the iOS 26.4 simulator (1830 OK, 0 failed) and on an Android API 36 emulator (1692 OK; the one failure is the network-dependent IMAGE-CACHE.test_ImageCache_ValidUrl timeout, which also passes on reruns).

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@triniwiz
fix(core): boolean properties and class substring operators in attrib…
bc871b7 
…ute selectors

- `[attr]` no longer matches a boolean property that is false. Every view
  has `hidden` (false by default), so `[hidden] { display: none }` from
  a CSS reset (Tailwind's preflight, Bootstrap's Reboot) hid the whole
  app. A boolean is now present only while true, like an HTML boolean
  attribute; `[hidden=false]` still compares by value.
- `[class*=x]`, `[class^=x]`, `[class$=x]`, `[class=x]` and `[class|=x]`
  were all turned into the class selector `.x`, ignoring the operator.
  Only `.x` and `[class~=x]` are class matches now; the other operators
  match the class attribute's text.
@nx-cloud

nx-cloud Bot commented Oct 15, 2026 •
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View your CI Pipeline Execution ↗ for commit aab87c4

Command Status Duration Result
nx test apps-automated -c=android ✅ Succeeded 5m 18s View ↗
nx run-many --target=test --configuration=ci --... ✅ Succeeded <1s View ↗

💡 Verify your cache is correct by running tasks in a sandbox. Read docs ↗

☁️ Nx Cloud last updated this comment at 2026-10-15 20:38:45 UTC
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@pkg-pr-new

pkg-pr-new Bot commented Oct 15, 2026 •
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npm i https://pkg.pr.new/@nativescript/core@11529

npm i https://pkg.pr.new/@nativescript/vite@11529

npm i https://pkg.pr.new/@nativescript/webpack@11529

commit: aab87c4
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@triniwiz
chore(core): drop comments
aab87c4

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@triniwiz
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