That Third-Party Script Tag You Copy-Pasted Is Probably Hurting
typescript
dev.to
Chat widgets, analytics snippets, ad network tags, review platform embeds, nearly all of them ship with a copy-paste snippet meant for a plain HTML page, and pasted directly into a Next.js app without modification, several of them quietly do real damage to your actual performance metrics for content that has nothing to do with the widget itself. The Copy-Paste That Looks Harmless // app/layout.tsx export default function RootLayout({ children }) { return ( html> head>