text-generation-webui/extensions/gallery/script.js

let gallery_element = document.getElementById('gallery-extension');

main_parent.addEventListener('click', function(e) {
    let chat_visible = (chat_tab.offsetHeight > 0 && chat_tab.offsetWidth > 0);
    let notebook_visible = (notebook_tab.offsetHeight > 0 && notebook_tab.offsetWidth > 0);
    let default_visible = (default_tab.offsetHeight > 0 && default_tab.offsetWidth > 0);

    // Only show this extension in the Chat tab
    if (chat_visible) {
        gallery_element.style.display = 'block';
    } else {
        gallery_element.style.display = 'none';
    }
});