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cms-core/Documentation/Changelog/14.2/Deprecation-109171-BootstrapTabEvents.rst
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.. include:: /Includes.rst.txt
.. _deprecation-109171-1741254000:
===========================================
Deprecation: #109171 - Bootstrap tab events
===========================================
See :issue:`109171`
Description
===========
Bootstrap's tab JavaScript has been replaced with a custom implementation
tailored to TYPO3. The Bootstrap tab events :js:`show.bs.tab` and
:js:`shown.bs.tab` are now deprecated and will be removed in TYPO3 v15.
The following new custom events are available as replacements:
* :js:`typo3:tab:show` — dispatched before a tab switch, cancelable via
:js:`event.preventDefault()`
* :js:`typo3:tab:shown` — dispatched after a tab switch
Both events bubble from the tab button and carry a
:js:`detail.relatedTarget` property that points to the previously active tab
button or :js:`null`.
Impact
======
Listening for :js:`show.bs.tab` or :js:`shown.bs.tab` events will continue to
work in TYPO3 v14 but will stop working in TYPO3 v15, when the backward-
compatibility events will be removed.
Affected installations
======================
All extensions that listen to :js:`show.bs.tab` or :js:`shown.bs.tab` events
on tab buttons are affected.
Migration
=========
Replace Bootstrap tab event listeners with the new TYPO3 tab events.
Before:
.. code-block:: js
document.addEventListener('show.bs.tab', (e) => {
console.log(
'Tab is about to show',
e.target,
e.detail.relatedTarget
);
});
document.addEventListener('shown.bs.tab', (e) => {
console.log(
'Tab was shown',
e.target,
e.detail.relatedTarget
);
});
After:
.. code-block:: js
document.addEventListener('typo3:tab:show', (e) => {
console.log('Tab is about to show', e.target, e.detail.relatedTarget);
});
document.addEventListener('typo3:tab:shown', (e) => {
console.log('Tab was shown', e.target, e.detail.relatedTarget);
});
.. index:: Backend, JavaScript, NotScanned, ext:backend