How to wait for animations to complete in Playwright script

async function waitNoMutations(page, selector) { return await page.evaluateHandle(function (selector) { var list = document.querySelectorAll(selector); var elements = [].slice.call(list); var config = { attributes: true, childList: true, subtree: true }; var mutations = 5; // wait at least five intervals var observer = new MutationObserver(function () { mutations += 1; }); elements.forEach(function (target) { observer.observe(target, config); }); var decrementInterval = setInterval(function () { mutations -= 1; if (mutations <= 0) { clearInterval(decrementInterval); } }, 5); // this quant might be reduced? function complete() { return mutations <= 0; } return new Promise(function (resolve) { var count = 0; var completeInterval = setInterval(function () { if (count >= 1000) { // timeout? clearInterval(completeInterval); observer.disconnect(); resolve("timeout"); return; } if (complete()) { clearInterval(completeInterval); observer.disconnect(); resolve(true); return; } count += 1; }, 5); }); }, selector); }