Remember active nested tab in Bricks

Copy and paste the snippet below into the Body (footer) scripts area and not a code block. Make sure to replace .my-element with your element’s class:

function setActiveTabOnPageLoad() {
    const tabTitles = document.querySelectorAll(".my-element .tab-title");
    const tabPanes = document.querySelectorAll(".my-element .tab-pane");
    let savedTabIndex = localStorage.getItem("my-tab");

    // Use fallback to the first tab if no valid index is found
    if (savedTabIndex === null || isNaN(savedTabIndex) || !tabTitles[savedTabIndex]) {
        savedTabIndex = 0; // Default to the first tab
        localStorage.setItem("my-tab", savedTabIndex); // Set the default in local storage
    } else {
        savedTabIndex = parseInt(savedTabIndex, 10);
    }

    // Reset all tabs and panes first
    tabTitles.forEach((tab) => {
        tab.classList.remove("brx-open");
        tab.setAttribute("aria-pressed", "false");
    });
    tabPanes.forEach((pane) => {
        pane.classList.remove("brx-open");
    });

    // Activate the tab and corresponding pane matching the saved or fallback index
    const activeTab = tabTitles[savedTabIndex];
    const activePane = tabPanes[savedTabIndex];
    if (activeTab) {
        activeTab.classList.add("brx-open");
        activeTab.setAttribute("aria-pressed", "true");
    }
    if (activePane) {
        activePane.classList.add("brx-open");
    }
}

function addClickHandlersToTabs() {
    const tabTitles = document.querySelectorAll(".my-element .tab-title");
    const tabPanes = document.querySelectorAll(".my-element .tab-pane");

    tabTitles.forEach((tab, index) => {
        tab.addEventListener("click", function () {
            // Update local storage with the clicked tab index
            localStorage.setItem("my-tab", index);

            // Reset all tabs and panes first
            tabTitles.forEach((t) => {
                t.classList.remove("brx-open");
                t.setAttribute("aria-pressed", "false");
            });
            tabPanes.forEach((pane) => {
                pane.classList.remove("brx-open");
            });

            // Activate the clicked tab and corresponding pane
            tab.classList.add("brx-open");
            tab.setAttribute("aria-pressed", "true");
            const activePane = tabPanes[index];
            if (activePane) {
                activePane.classList.add("brx-open");
            }
        });
    });
}

// Initialize both functions
document.addEventListener("DOMContentLoaded", function () {
    setActiveTabOnPageLoad(); // Set the correct tab and pane on page load
    addClickHandlersToTabs(); // Set up click events to handle tab and pane changes
});