class WooThumbnails { #elements = { thumbsVerticalLayout: document.querySelector(".owp-thumbs-layout-vertical"), }; constructor() { if (!!this.#elements.thumbsVerticalLayout) { this.#setupEventListeners(); } } #setupEventListeners = () => { window.addEventListener("load", this.#start); window.addEventListener("resize", this.#start); }; #start = () => { const thumbsNav = this.#elements.thumbsVerticalLayout.querySelector(".flex-control-nav"); if (!!thumbsNav) { if (window.innerWidth > 768) { const imageHeight = this.#elements.thumbsVerticalLayout.querySelector( ".flex-viewport" )?.offsetHeight; const navHeight = this.#elements.thumbsVerticalLayout.querySelector( ".flex-control-nav" )?.offsetHeight; if (navHeight > imageHeight + 50) { thumbsNav.style.maxHeight = `${imageHeight}px`; } } else { thumbsNav.style.maxHeight = ""; } } }; } new WooThumbnails();