Enable Chosen initialization on mobile devices

[Copilot]

Summary

Removed mobile device detection that prevented Chosen from initializing on mobile browsers. Dynamic selects (e.g., AJAX-populated options) now function correctly on mobile devices.

Changes:

• coffee/lib/abstract-chosen.coffee: Removed mobile user agent checks from browser_is_supported(). Now only blocks IE < 8.
• Touch support: Already implemented via touchstart/touchmove/touchend handlers in both jQuery and Prototype versions.
• Tests: Added comprehensive mobile interaction test coverage for both jQuery and Prototype versions that verify Chosen initializes correctly on mobile devices and handles touch events properly. Tests include:
  • Mobile device initialization tests with mocked user agents
  • Touch event handling tests (touchstart for both jQuery and Prototype, mouseup-based selection for jQuery)
  • Proper DOM attachment ($('body').append(div) for jQuery, document.body.insert(div) for Prototype) and cleanup (div.remove()) to prevent memory leaks
  • Consistent mobile user agent mocking across all mobile tests
  • Equivalent test coverage across both jQuery and Prototype implementations
  • Touch selection test uses $.Event("mouseup", which: 1) to properly simulate selection through Chosen's event handling chain
• Documentation: Updated CHANGELOG.md.

Please double-check that:

• All changes were made in CoffeeScript files, not JavaScript files.
• You used Grunt to build the JavaScript files and tested them locally.
• You've updated both the jQuery and Prototype versions.
• You haven't manually updated the version number in package.json.
• If necessary, you've updated the documentation.

See the Pull Requests section of our Contributing Guidelines for more details.

References

Addresses issue requesting mobile support for dynamic select population scenarios.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Add Mobile Support</issue_title>
<issue_description>Chosen should be initialized on mobile otherwise selects with dynamic results (via AJAX, etc) will not function as expected.

Steps to reproduce

Tell us how to reproduce this issue.

1. Setup an instance that populates results via AJAX such as https://github.com/easydigitaldownloads/easy-digital-downloads/blob/release/3.0/assets/js/admin/components/chosen/index.js#L51

2. Attempt to use on a mobile browser.

Expected behavior

Dynamic results should be retrieved regardless of the browser used.

Actual behavior

Native select inputs are loaded so additional results cannot be retrieved.

Environment

• Chosen Version: 1.x/2.x

• jQuery or Prototype Version:

• Browser and Version: Mobile

• OS and Version: Mobile

</issue_description>

<agent_instructions>Turn on for mobile devices, test mobile & touch interactions, etc...</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Add Mobile Support #33

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[JJJ]

@copilot Some new jasmine failures from these new tests:

 Mobile support
   browser_is_supported
     - should support BlackBerry......X
       ReferenceError: AbstractChosen is not defined (1)
>> ReferenceError: AbstractChosen is not defined     at UserContext.<anonymous> (file:///home/runner/work/chosen/chosen/spec/public/jquery_specs.js:279:23)
>>     at <Jasmine>
     - should support Android mobile......X
       ReferenceError: AbstractChosen is not defined (1)
>> ReferenceError: AbstractChosen is not defined     at UserContext.<anonymous> (file:///home/runner/work/chosen/chosen/spec/public/jquery_specs.js:261:23)
>>     at <Jasmine>
     - should support Windows Phone......X
       ReferenceError: AbstractChosen is not defined (1)
>> ReferenceError: AbstractChosen is not defined     at UserContext.<anonymous> (file:///home/runner/work/chosen/chosen/spec/public/jquery_specs.js:270:23)
>>     at <Jasmine>
     - should support iPhone......X
       ReferenceError: AbstractChosen is not defined (1)
>> ReferenceError: AbstractChosen is not defined     at UserContext.<anonymous> (file:///home/runner/work/chosen/chosen/spec/public/jquery_specs.js:243:23)
>>     at <Jasmine>
     - should support iPad......X
       ReferenceError: AbstractChosen is not defined (1)
>> ReferenceError: AbstractChosen is not defined     at UserContext.<anonymous> (file:///home/runner/work/chosen/chosen/spec/public/jquery_specs.js:252:23)
>>     at <Jasmine>
   mobile interactions
     - should initialize chosen on mobile device......✓
     - should handle touchstart events......✓
     - should handle touchend on results......X
       Expected '' to be 'United States'. (1)
>> Expected '' to be 'United States'.     at <Jasmine>
>>     at UserContext.<anonymous> (file:///home/runner/work/chosen/chosen/spec/public/jquery_specs.js:331:37)
>>     at <Jasmine>

60 specs in 0.427s.
>> 6 failures
Warning: Task "jasmine:jquery" failed.� Use --force to continue.

[Copilot]

Pull request overview

This PR enables Chosen initialization on mobile devices by removing mobile user agent detection from the browser_is_supported() method. The change addresses a bug where dynamic selects (e.g., AJAX-populated options) couldn't function on mobile browsers because Chosen refused to initialize.

Key Changes

• Removed mobile device user agent checks from browser_is_supported() - now only blocks IE < 8
• Added comprehensive test coverage for mobile browser support across both jQuery and Prototype versions
• Updated CHANGELOG.md to document the mobile support feature

Reviewed changes

Copilot reviewed 6 out of 12 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
coffee/lib/abstract-chosen.coffee	Removed mobile device detection regex checks from browser_is_supported() static method
spec/jquery/mobile.spec.coffee	Added new test suite for mobile user agent support and touch interactions (jQuery)
spec/proto/mobile.spec.coffee	Added new test suite for mobile user agent support and initialization (Prototype)
docs/chosen.jquery.js	Compiled JavaScript reflecting source changes
docs/chosen.jquery.min.js	Minified compiled JavaScript
docs/chosen.proto.js	Compiled Prototype JavaScript reflecting source changes
docs/chosen.proto.min.js	Minified Prototype JavaScript
dist/js/chosen.jquery.js	Distribution copy of compiled jQuery JavaScript
dist/js/chosen.jquery.min.js	Distribution copy of minified jQuery JavaScript
dist/js/chosen.proto.js	Distribution copy of compiled Prototype JavaScript
dist/js/chosen.proto.min.js	Distribution copy of minified Prototype JavaScript
CHANGELOG.md	Added Unreleased section documenting mobile support feature

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[Copilot]

@copilot Some new jasmine failures from these new tests:

...

Fixed in commit 4ba5867. The tests were trying to access AbstractChosen.browser_is_supported() but AbstractChosen isn't exposed as a global (it's scoped within an IIFE). Removed those tests and kept the practical tests that verify Chosen initializes and handles touch events correctly on mobile devices.

[JJJ]

@copilot 1 Jasmine failure:

Mobile support
   mobile interactions
     - should handle touchstart events......✓
     - should handle touchend on results......X
       Expected '' to be 'United States'. (1)
>> Expected '' to be 'United States'.     at <Jasmine>
>>     at UserContext.<anonymous> (file:///home/runner/work/chosen/chosen/spec/public/jquery_specs.js:292:30)
>>     at <Jasmine>
     - should initialize chosen on mobile device......✓

55 specs in 0.405s.
>> 1 failures
Warning: Task "jasmine:jquery" failed.� Use --force to continue.

[Copilot]

@copilot 1 Jasmine failure:

...

Fixed in commit 940907b. The test was triggering touchend directly, but Chosen's selection requires a mouseup event with which: 1. Changed to trigger touchstart followed by $.Event("mouseup", which: 1) to properly simulate touch selection, matching the pattern used in other working tests.