A strong case can be made that JavaScript is better than TypeScript for many projects. Here are the main arguments.
1. It's the language that actually runs
Browsers and Node.js execute JavaScript, not TypeScript. TypeScript is an additional layer that must be compiled away. Every TypeScript project ultimately becomes JavaScript.
2. Less complexity
A JavaScript project has fewer moving parts:
- No compiler
- No
tsconfig.json - No type definitions (
@types/...) - No type errors to fix
- Fewer build issues
This can make projects easier to set up and maintain.
3. Faster prototyping
When you're experimenting, building an MVP, or writing automation scripts, types can slow you down.
const user = fetchUser()user.age = 30
In TypeScript, you may end up spending time defining interfaces and satisfying the type checker instead of building features.
4. TypeScript isn't truly type-safe
TypeScript's type system is intentionally unsound in places to remain compatible with JavaScript.
You can always bypass it:
const x = value as any
or
// @ts-ignore
At runtime, the types disappear completely.
5. Runtime bugs still exist
Many developers assume TypeScript prevents bugs.
It doesn't.
These still happen:
- network failures
- null values from APIs
- malformed JSON
- race conditions
- logic errors
- database errors
You still need runtime validation.
6. Less code
JavaScript is usually more concise.
TypeScript often requires:
- interfaces
- enums
- generics
- utility types
- explicit annotations
For small projects this can feel like unnecessary overhead.
7. Easier onboarding
Every web developer knows JavaScript.
Not every developer understands:
- mapped types
- conditional types
- generic constraints
- declaration merging
- type inference edge cases
A JavaScript codebase may be easier for newcomers to contribute to.
8. Modern JavaScript is already much better
Features like:
constlet- modules
- classes
- optional chaining
- nullish coalescing
- destructuring
have eliminated many of the problems that existed a decade ago.
9. Excellent testing can replace many benefits
Good unit tests and integration tests catch many of the same mistakes TypeScript is designed to prevent—and they also verify runtime behavior, which TypeScript cannot.
10. Major projects succeed without TypeScript
Many successful applications and libraries were built in plain JavaScript. Good engineering practices, testing, code reviews, and modular design often matter more than static typing.
The strongest argument
The biggest criticism of TypeScript is that it introduces additional complexity whose benefits don't always justify the cost.