Playwrightで特定のDom要素の変化を検知する - Qiita

// 該当Webpageで対象Dom要素の変化を監視 await page.locator('[id=chat-container]').evaluate(element => { const observer = new MutationObserver(mutationsList => { if (mutationsList[0]?.type !== 'childList') return; // 該当変化をConsoleに出力 console.log(`@@NewMessage@@ ${mutationsList[0].addedNodes[0].textContent}`); }); observer.observe(element, { childList: true, subtree: true }); }); // PlaywrightでConsoleの出力を監視 page.