Filter Bar > Open the Filter Bar on mobile on initial pageload

tec-open-filterbar.php

<?php
/**
 * Open the Filter Bar on mobile on initial pageload.
 *
 * By default, Filter Bar is closed on mobile regardless of the setting.
 * With this snippet Filter Bar will show on pageload when using the horizontal setup.
 *
 * Usage: Add the snippet to your functions.php file or with a plugin like Code Snippets.
 *
 * @author: Andras Guseo
 *
 * Plugins required: The Events Calendar, Filter Bar
 * Created: January 19, 2024
 */
function tec_open_filterbar() {
	echo '<script>
	let fbSelector = document.querySelector(".tribe-filter-bar.tribe-filter-bar--horizontal");
	if(fbSelector != null) {
		fbSelector.classList += " tribe-filter-bar--open";
		fbSelector.style.position = "unset";
	}
	</script>';
}

add_action( 'wp_footer', 'tec_open_filterbar' );