Accordion widget buggy transition

[BezV8]

When using the code sample from https://devdocs.magento.com/guides/v2.3/javascript-dev-guide/widgets/widget_accordion.html for an accordion widget - but setting the animate property to a numeric value - the transition works correctly for individual collapse elements, but when clicking to open a closed element the currently open element closes instantaniously without a transition.

Preconditions (*)

1. Magento 2.3.2 & 2.3-develop

Steps to reproduce (*)

1. Add an accordion widget to any page using the code sample from https://devdocs.magento.com/guides/v2.3/javascript-dev-guide/widgets/widget_accordion.html
2. Assign a numeric value to the 'animate' option e.g. "animate": {"duration": 600}
   Using the following HTML for the accordion:

<div id="accordion" data-mage-init='{
        "accordion":{
            "collapsible": true,
            "openedState": "active",
            "openOnFocus": true,
            "animate": {"duration": 600}
        }}'>
  <div data-role="collapsible">
    <div data-role="trigger">
      <h4>Title 1</h4>
    </div>
  </div>
  <div data-role="content">Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s</div>
  <div data-role="collapsible">
    <div data-role="trigger">
      <h4>Title 2</h4>
    </div>
  </div>
  <div data-role="content">It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.</div>
  <div data-role="collapsible">
    <div data-role="trigger">
      <h4>Title 3</h4>
    </div>
  </div>
  <div data-role="content">Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old.</div>
</div>

3. Open a closed element and observe the transition of both it and the currently open element.

Expected result (*)

1. Both elements transition according to the time set in the animate property.

Actual result (*)

1. The element being clicked or focused transitions according to the animate property
2. The currently open element closes instantly causing a jerky transition.
   

[m2-assistant]

Hi @BezV8. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

• Summary of the issue
• Information on your environment
• Steps to reproduce
• Expected and actual results

Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento give me 2.3-develop instance - upcoming 2.3.x release

For more details, please, review the Magento Contributor Assistant documentation.

@BezV8 do you confirm that you were able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

---

• Join Magento Community Engineering Slack and ask your questions in #github channel.

[BezV8]

@magento give me 2.3-develop instance

[magento-engcom-team]

Hi @BezV8. Thank you for your request. I'm working on Magento 2.3-develop instance for you

[magento-engcom-team]

Hi @BezV8, here is your Magento instance.
Admin access: https://i-24807-2-3-develop.instances.magento-community.engineering/admin
Login: admin Password: 123123q
Instance will be terminated in up to 3 hours.

[BezV8]

@magento I can confirm the problem is present on the test instance.

Using the following HTML for the accordion:

<div id="accordion" data-mage-init='{
        "accordion":{
            "collapsible": true,
            "openedState": "active",
            "openOnFocus": true,
            "animate": {"duration": 600}
        }}'>
  <div data-role="collapsible">
    <div data-role="trigger">
      <h4>Title 1</h4>
    </div>
  </div>
  <div data-role="content">Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s</div>
  <div data-role="collapsible">
    <div data-role="trigger">
      <h4>Title 2</h4>
    </div>
  </div>
  <div data-role="content">It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.</div>
  <div data-role="collapsible">
    <div data-role="trigger">
      <h4>Title 3</h4>
    </div>
  </div>
  <div data-role="content">Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old.</div>
</div>

[m2-assistant]

Hi @engcom-Charlie. Thank you for working on this issue.
In order to make sure that issue has enough information and ready for development, please read and check the following instruction: 👇

• 1. Verify that issue has all the required information. (Preconditions, Steps to reproduce, Expected result, Actual result).

  Details

  If the issue has a valid description, the label Issue: Format is valid will be added to the issue automatically. Please, edit issue description if needed, until label Issue: Format is valid appears.

• 2. Verify that issue has a meaningful description and provides enough information to reproduce the issue. If the report is valid, add Issue: Clear Description label to the issue by yourself.

• 3. Add Component: XXXXX label(s) to the ticket, indicating the components it may be related to.

• 4. Verify that the issue is reproducible on 2.3-develop branch

  Details

  - Add the comment @magento give me 2.3-develop instance to deploy test instance on Magento infrastructure.
  - If the issue is reproducible on 2.3-develop branch, please, add the label Reproduced on 2.3.x.
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[magento-engcom-team]

✅ Confirmed by @engcom-Charlie
Thank you for verifying the issue. Based on the provided information internal tickets MC-21499 were created

Issue Available: @engcom-Charlie, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.