chore(deps): update angular-eslint monorepo to v21 (major)

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@angular-eslint/builder (source)	20.7.0 -> 21.0.1
@angular-eslint/eslint-plugin (source)	20.7.0 -> 21.0.1
@angular-eslint/eslint-plugin-template (source)	20.7.0 -> 21.0.1
@angular-eslint/schematics (source)	20.7.0 -> 21.0.1
@angular-eslint/template-parser (source)	20.7.0 -> 21.0.1

---

Release Notes

angular-eslint/angular-eslint (@​angular-eslint/builder)

v21.0.1

Compare Source

This was a version bump only for builder to align it with other projects, there were no code changes.

v21.0.0

Compare Source

🩹 Fixes

• ⚠️ builder: align formatter invocation with eslint CLI by always passing all files, even if quiet (bceaa80e)

⚠️ Breaking Changes

• ⚠️ builder: align formatter invocation with eslint CLI by always passing all files, even if quiet (bceaa80e)

❤️ Thank You

• JamesHenry @​JamesHenry

20.7.0 (2025-11-22)

This was a version bump only for builder to align it with other projects, there were no code changes.

20.6.0 (2025-11-09)

🚀 Features

• builder: support {projectName} and {projectRoot} placeholders in outputFile (#​2759)

❤️ Thank You

• James Henry @​JamesHenry

20.5.2 (2025-11-08)

This was a version bump only for builder to align it with other projects, there were no code changes.

20.5.1 (2025-11-03)

This was a version bump only for builder to align it with other projects, there were no code changes.

20.5.0 (2025-10-27)

This was a version bump only for builder to align it with other projects, there were no code changes.

20.4.0 (2025-10-12)

This was a version bump only for builder to align it with other projects, there were no code changes.

20.3.0 (2025-09-14)

🚀 Features

• builder: add concurrency option (#​2636)

❤️ Thank You

• JB Nizet

20.2.0 (2025-08-22)

This was a version bump only for builder to align it with other projects, there were no code changes.

20.1.1 (2025-06-19)

This was a version bump only for builder to align it with other projects, there were no code changes.

20.1.0 (2025-06-16)

This was a version bump only for builder to align it with other projects, there were no code changes.

angular-eslint/angular-eslint (@​angular-eslint/eslint-plugin)

v21.0.1

Compare Source

This was a version bump only for eslint-plugin to align it with other projects, there were no code changes.

v21.0.0

Compare Source

🚀 Features

• ⚠️ eslint-plugin: formally deprecate [no-conflicting-lifecycle] and remove from "all" config (5d845924)

🩹 Fixes

• ⚠️ eslint-plugin: make component-selector and directive-selector configurations strict and clear (938362cb)

⚠️ Breaking Changes

• ⚠️ eslint-plugin: formally deprecate [no-conflicting-lifecycle] and remove from "all" config (5d845924)
• eslint-plugin: make component-selector and directive-selector configurations strict and clear (938362cb)
  The selector validation logic has been updated to be more strict and
  predictable:
  Default Prefix Change:
  • Both component-selector and directive-selector now default to prefix: 'app' to match
    Angular CLI defaults
  • This means selectors without the 'app' prefix will now fail validation unless a
    different prefix is explicitly configured
    Style and Prefix Validation Changes:
  • Single-word selectors (e.g., 'appselector') are now appropriately considered valid for
    both camelCase and kebab-case styles
  • Style validation is now completely independent from prefix validation
  • When a prefix is defined and found in a selector, the rule now correctly validates
    whether the prefix is properly separated according to the style:
    • For kebab-case: prefix must be followed by a hyphen (e.g., 'app-selector' ✓,
      'appselector' ✗)
    • For camelCase: prefix must be followed by an uppercase letter (e.g., 'appSelector' ✓,
      'appselector' ✗)
      Changes to error reporting:
  • Selectors that have valid style but improper prefix usage now report 'prefixFailure'
    instead of 'styleAndPrefixFailure'
  • Example: 'sgggg-bar' with prefix 'sg' and style 'kebab-case' now reports
    'prefixFailure' (valid kebab-case, but prefix not properly separated)
    Migration Guide:
  • If you have components/directives without prefixes that were previously passing, either:
    1. Add the 'app' prefix to your selectors
    2. Configure a different prefix that matches your existing selectors
    3. Explicitly set prefix: [] or prefix: '' in your ESLint config to disable prefix checking
       These changes make the rules more predictable and align better with developer expectations
       while maintaining compatibility with Angular's compiler requirements for web components.

❤️ Thank You

• JamesHenry @​JamesHenry

20.7.0 (2025-11-22)

🩹 Fixes

• eslint-plugin: [use-component-selector] detect variables (#​2797)
• eslint-plugin: false negatives in pipe-prefix, component-selector and directive-selector when linting selectors that only contain a prefix (#​2769)
• eslint-plugin: [prefer-inject] improve test coverage and documentation (#​2770)

❤️ Thank You

• Dmitry Zakharov @​pumano
• Evgeny Stepanovych @​undsoft
• James Henry @​JamesHenry

20.6.0 (2025-11-09)

🚀 Features

• eslint-plugin: support multiple configs for component-selector and directive-selector (#​2762)

❤️ Thank You

• James Henry @​JamesHenry

20.5.2 (2025-11-08)

🩹 Fixes

• eslint-plugin: update style guide links (#​2689)
• eslint-plugin-template: [use-lifecycle-interface] fix fixer when class contains generics (#​2749)

❤️ Thank You

• Aristeidis Bampakos @​bampakoa
• Evgeny Stepanovych @​undsoft

20.5.1 (2025-11-03)

🩹 Fixes

• eslint-plugin: [no-uncalled-signals] fix false positives (#​2705)

❤️ Thank You

• Dave @​reduckted

20.5.0 (2025-10-27)

🚀 Features

• eslint-plugin: add rule prefer-host-metadata-property (#​2615)

❤️ Thank You

• jase @​jase88

20.4.0 (2025-10-12)

This was a version bump only for eslint-plugin to align it with other projects, there were no code changes.

20.3.0 (2025-09-14)

This was a version bump only for eslint-plugin to align it with other projects, there were no code changes.

20.2.0 (2025-08-22)

🩹 Fixes

• eslint-plugin: [no-uncalled-signals] do not report signal sets within logical expressions (#​2581)
• eslint-plugin: [relative-url-prefix] handle template literals (#​2576)

❤️ Thank You

• Dave @​reduckted
• James Henry @​JamesHenry

20.1.1 (2025-06-19)

🩹 Fixes

• eslint-plugin: [no-output-on-prefix] update style guide link (#​2514)

❤️ Thank You

• Victor Santelé

20.1.0 (2025-06-16)

🚀 Features

• eslint-plugin: add rules to ban experimental and developer preview (#​2037)

❤️ Thank You

• Daniel Kimmich @​json-derulo

angular-eslint/angular-eslint (@​angular-eslint/eslint-plugin-template)

v21.0.1

Compare Source

🩹 Fixes

• eslint-plugin-template: [prefer-contextual-for-variables] fix overlapping fixes for semicolon-separated let declarations (#​2802)
• eslint-plugin-template: [prefer-template-literal] handle chained concatenations correctly (#​2801)

❤️ Thank You

• James Henry @​JamesHenry

v21.0.0

Compare Source

🚀 Features

• ⚠️ eslint-plugin-template: add textContent to default allowList (f112c169)
• ⚠️ eslint-plugin-template: add prefer-control-flow to recommended config (77cd24d3)

🩹 Fixes

• ⚠️ eslint-plugin: make component-selector and directive-selector configurations strict and clear (938362cb)

⚠️ Breaking Changes

• ⚠️ eslint-plugin-template: add textContent to default allowList (f112c169)
• eslint-plugin: make component-selector and directive-selector configurations strict and clear (938362cb)
  The selector validation logic has been updated to be more strict and
  predictable:
  Default Prefix Change:
  • Both component-selector and directive-selector now default to prefix: 'app' to match
    Angular CLI defaults
  • This means selectors without the 'app' prefix will now fail validation unless a
    different prefix is explicitly configured
    Style and Prefix Validation Changes:
  • Single-word selectors (e.g., 'appselector') are now appropriately considered valid for
    both camelCase and kebab-case styles
  • Style validation is now completely independent from prefix validation
  • When a prefix is defined and found in a selector, the rule now correctly validates
    whether the prefix is properly separated according to the style:
    • For kebab-case: prefix must be followed by a hyphen (e.g., 'app-selector' ✓,
      'appselector' ✗)
    • For camelCase: prefix must be followed by an uppercase letter (e.g., 'appSelector' ✓,
      'appselector' ✗)
      Changes to error reporting:
  • Selectors that have valid style but improper prefix usage now report 'prefixFailure'
    instead of 'styleAndPrefixFailure'
  • Example: 'sgggg-bar' with prefix 'sg' and style 'kebab-case' now reports
    'prefixFailure' (valid kebab-case, but prefix not properly separated)
    Migration Guide:
  • If you have components/directives without prefixes that were previously passing, either:
    1. Add the 'app' prefix to your selectors
    2. Configure a different prefix that matches your existing selectors
    3. Explicitly set prefix: [] or prefix: '' in your ESLint config to disable prefix checking
       These changes make the rules more predictable and align better with developer expectations
       while maintaining compatibility with Angular's compiler requirements for web components.
• ⚠️ eslint-plugin-template: add prefer-control-flow to recommended config (77cd24d3)

❤️ Thank You

• JamesHenry @​JamesHenry

20.7.0 (2025-11-22)

🚀 Features

• eslint-plugin-template: [prefer-ngsrc] add suggestions (#​2772)

❤️ Thank You

• Evgeny Stepanovych @​undsoft

20.6.0 (2025-11-09)

This was a version bump only for eslint-plugin-template to align it with other projects, there were no code changes.

20.5.2 (2025-11-08)

🩹 Fixes

• eslint-plugin-template: [prefer-ngsrc] support data URLs in more scenarios (#​2719)
• eslint-plugin-template: [conditional-complexity] handle animation directives without values (#​2747)

❤️ Thank You

• Evgeny Stepanovych @​undsoft
• James Henry @​JamesHenry

20.5.1 (2025-11-03)

🩹 Fixes

• eslint-plugin-template: support uppercase tags (#​2712)

❤️ Thank You

• Evgeny Stepanovych @​undsoft

20.5.0 (2025-10-27)

🚀 Features

• eslint-plugin-template: add prefer-built-in-pipes rule (#​2605)

❤️ Thank You

• Andreas Nicolaou @​andreasnicolaou

20.4.0 (2025-10-12)

🚀 Features

• eslint-plugin-template: add rule prefer-at-else (#​2613)

❤️ Thank You

• Dave @​reduckted

20.3.0 (2025-09-14)

This was a version bump only for eslint-plugin-template to align it with other projects, there were no code changes.

20.2.0 (2025-08-22)

🚀 Features

• eslint-plugin-template: add rule no-empty-control-flow (#​2592)

🩹 Fixes

• eslint-plugin-template: [no-interpolation-in-attributes] disallow extra properties in options (#​2586)
• update dependency @​angular/compiler to v20.1.0 (#​2573)

❤️ Thank You

• Andrew Kazakov @​andreww2012
• Dave @​reduckted

20.1.1 (2025-06-19)

🩹 Fixes

• eslint-plugin-template: [no-interpolation-in-attributes] use keySpan as attr. range and sourceSpan as replacement range (#​2531)

❤️ Thank You

• Niklas Wolf

20.1.0 (2025-06-16)

This was a version bump only for eslint-plugin-template to align it with other projects, there were no code changes.

angular-eslint/angular-eslint (@​angular-eslint/schematics)

v21.0.1

Compare Source

This was a version bump only for schematics to align it with other projects, there were no code changes.

v21.0.0

Compare Source

🚀 Features

• schematics: generate new projects using eslint defineConfig (5aa8171b)
• ⚠️ update Angular dependencies to v21 (6a6b671e)

⚠️ Breaking Changes

• ⚠️ update Angular dependencies to v21 (6a6b671e)

❤️ Thank You

• JamesHenry @​JamesHenry

20.7.0 (2025-11-22)

This was a version bump only for schematics to align it with other projects, there were no code changes.

20.6.0 (2025-11-09)

This was a version bump only for schematics to align it with other projects, there were no code changes.

20.5.2 (2025-11-08)

This was a version bump only for schematics to align it with other projects, there were no code changes.

20.5.1 (2025-11-03)

This was a version bump only for schematics to align it with other projects, there were no code changes.

20.5.0 (2025-10-27)

🩹 Fixes

• update typescript-eslint packages to v8.46.1 (#​2701)
• update dependency eslint to v9.38.0 (#​2699)
• update dependency semver to v7.7.3 (#​2693)

20.4.0 (2025-10-12)

🩹 Fixes

• update eslint to 9.37.0, typescript-eslint to 8.46.0 (#​2685)

❤️ Thank You

• James Henry @​JamesHenry

20.3.0 (2025-09-14)

🩹 Fixes

• update dependency eslint to v9.35.0 (#​2652)
• update dependency eslint to v9.34.0 (#​2630)

20.2.0 (2025-08-22)

🩹 Fixes

• update typescript-eslint packages to v8.40.0 (#​2584)
• update dependency eslint to v9.33.0 (#​2580)
• update typescript-eslint packages to v8.36.0 (#​2566)
• update dependency eslint to v9.30.1 (#​2558)
• update typescript-eslint packages to v8.35.1 (#​2552)
• update dependency eslint to v9.30.0 (#​2548)
• update typescript-eslint packages to v8.35.0 (#​2541)

20.1.1 (2025-06-19)

🩹 Fixes

• update typescript-eslint packages to v8.34.1 (#​2522)

20.1.0 (2025-06-16)

🩹 Fixes

• update typescript-eslint packages to v8.34.0 (#​2511)
• update dependency eslint to v9.29.0 (#​2520)

angular-eslint/angular-eslint (@​angular-eslint/template-parser)

v21.0.1

Compare Source

This was a version bump only for template-parser to align it with other projects, there were no code changes.

v21.0.0

Compare Source

This was a version bump only for template-parser to align it with other projects, there were no code changes.

20.7.0 (2025-11-22)

This was a version bump only for template-parser to align it with other projects, there were no code changes.

20.6.0 (2025-11-09)

This was a version bump only for template-parser to align it with other projects, there were no code changes.

20.5.2 (2025-11-08)

🩹 Fixes

• template-parser: ensure loc object is applied correctly (#​2754)

❤️ Thank You

• James Henry @​JamesHenry

20.5.1 (2025-11-03)

This was a version bump only for template-parser to align it with other projects, there were no code changes.

20.5.0 (2025-10-27)

This was a version bump only for template-parser to align it with other projects, there were no code changes.

20.4.0 (2025-10-12)

This was a version bump only for template-parser to align it with other projects, there were no code changes.

20.3.0 (2025-09-14)

This was a version bump only for template-parser to align it with other projects, there were no code changes.

20.2.0 (2025-08-22)

🩹 Fixes

• update dependency @​angular/compiler to v20.1.1 (#​2587)
• update dependency @​angular/compiler to v20.1.0 (#​2573)

20.1.1 (2025-06-19)

This was a version bump only for template-parser to align it with other projects, there were no code changes.

20.1.0 (2025-06-16)

This was a version bump only for template-parser to align it with other projects, there were no code changes.

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