Even if you don't opt in to full TypeScript, please do remember that the same engine powering the TypeScript language is also what powers IDE support and comple

Even if you don't opt in to full TypeScript, please do remember that the same engine powering the TypeScript language is also what powers IDE support and completions for JS in vscode and VS, so even if you're not using TypeScript _the language_, you're potentially still using TypeScript, _the static analysis tool_. Even without opting in to full type safety, having those tools available can still be a huge quality of life improvement.