66 lines
2.0 KiB
JavaScript
66 lines
2.0 KiB
JavaScript
// Enable Vector features limited to ES6 browse
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const
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searchToggle = require( './searchToggle.js' ),
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stickyHeader = require( './stickyHeader.js' ),
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scrollObserver = require( './scrollObserver.js' ),
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AB = require( './AB.js' );
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/**
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* @return {void}
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*/
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const main = () => {
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// Initialize the search toggle for the main header only. The sticky header
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// toggle is initialized after wvui search loads.
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const searchToggleElement = document.querySelector( '.mw-header .search-toggle' );
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if ( searchToggleElement ) {
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searchToggle( searchToggleElement );
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}
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// Get the A/B test config for sticky header if enabled.
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const
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FEATURE_TEST_GROUP = 'stickyHeaderEnabled',
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testConfig = AB.getEnabledExperiment(),
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stickyConfig = testConfig &&
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// @ts-ignore
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testConfig.experimentName === stickyHeader.STICKY_HEADER_EXPERIMENT_NAME ?
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testConfig : null,
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// Note that the default test group is set to experience the feature by default.
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// @ts-ignore
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testGroup = stickyConfig ? stickyConfig.group : FEATURE_TEST_GROUP,
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targetElement = stickyHeader.header,
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targetIntersection = stickyHeader.stickyIntersection,
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isStickyHeaderAllowed = stickyHeader.isStickyHeaderAllowed() &&
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testGroup !== 'unsampled' && AB.isInTestGroup( testGroup, FEATURE_TEST_GROUP );
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// Fire the A/B test enrollment hook.
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AB.initAB( testGroup );
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// Set up intersection observer for sticky header functionality and firing scroll event hooks
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// for event logging if AB test is enabled.
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const observer = scrollObserver.initScrollObserver(
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() => {
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if ( targetElement && isStickyHeaderAllowed ) {
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stickyHeader.show();
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}
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scrollObserver.fireScrollHook( 'down' );
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},
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() => {
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if ( targetElement && isStickyHeaderAllowed ) {
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stickyHeader.hide();
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}
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scrollObserver.fireScrollHook( 'up' );
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}
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);
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if ( isStickyHeaderAllowed ) {
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stickyHeader.initStickyHeader( observer );
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} else if ( targetIntersection ) {
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observer.observe( targetIntersection );
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}
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};
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module.exports = {
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main: main
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};
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