- Pull IntersectionObserver into new file to share observer with different callbacks:
- Wrap show/hide functionality of sticky header in conditionals based on user test group or by default.
- Fire hooks for scroll event tracking in WME.
- Add new js for A/B test functions and variables:
- Fire hook to send data for A/B test initialization.
- Update main js to include scrollObserver, A/B test init functionality.
- Add A/B test config.
- Update ResourceLoader package dependencies for sticky header.
- Though not a strict dependency, see I42e3e7c2084c1e88363d5d1662630ed23a28c4d2 in WME repo which uses these hooks to log scroll events.
- This patch includes changes from I56f40e706f8706fde1c0891a0561dd32c5e02bfc which were consolidated here for simplicity and ease of review - related to T292587 which calls for logging an init event for bucketing of users during A/B testing.
Bug: T292586
Change-Id: If6446e1e84cea3649905808c4f0e9f6862255fa3
stickyHeader.js, a file in the "skins.vector.es6" module, clones the
user menu. Because of this, it must initialize before dropdownMenu.js, a
file in the "skins.vector.js" module, in order for dropdownMenu.js to
bind the correct checkboxHack event listeners to the user menu in the
sticky header.
Therefore, change the es6 module to export its main method. The
skins.vector.js module can then use mw.loader.using to ensure the
skins.vector.es6 module initialization happens first in browsers that
support es6. Browsers that don't support es6 will continue to initialize
the skins.vector.js module.
Bug: T291096
Change-Id: I1bb6f2da9703ed2679eacfdb42b9818efe614ab9
- Can now use const/let
- No need for feature detection for things like fetch and closest
as we can assume they exist if ES6 support is available
Change-Id: I85b01add13fd74e1514119498815403e42a09af0
This will allow us to write ES6 code for the new features which
is limited to those browsers.
For browsers that do not support ES6, the code will not execute
because of the "es6" flag. Doing this will help us avoid issues
like T293402
Change-Id: Iffb7098cb22395e33b87352fb4f08516f6f25e6f
