Suggest an editImprove this articleRefine the answer for “JS vs TS classes”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)Classes exist in both **JavaScript** and **TypeScript**, but TypeScript adds typing of properties and methods, access modifiers, `readonly` fields, abstract classes, interfaces with `implements`, generics, and compile-time type checking. **Key point:** JavaScript has only the classes themselves with none of these features - everything listed is available only in TypeScript.Shown above the full answer for quick recall.Answer (EN)Image| Feature | JavaScript | TypeScript | |---|---|---| | Classes | Yes | Yes | | Typing of properties/methods | No | Yes | | Access modifiers | No | Yes | | `readonly` fields | No | Yes | | Abstract classes | No | Yes | | Interfaces and `implements` | No | Yes | | Generics | No | Yes | | Decorators | (new standard) | Yes (earlier) | | Compile-time type checking | No | Yes | | `constructor(public field)` syntax | No | Yes |For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.