JavaScript vs TypeScript
Comparing JavaScript Source File and TypeScript Source File — which format should you use?
| JavaScript | TypeScript | |
|---|---|---|
| Full Name | JavaScript Source File | TypeScript Source File |
| Extension | .js | .ts |
| MIME Type | application/javascript | application/typescript |
| Category | data | data |
JavaScript Pros
- +Runs in every web browser
- +Huge ecosystem (npm has 2M+ packages)
- +Can be used for frontend and backend
- +Dynamic and flexible
JavaScript Cons
- -Dynamic typing can cause bugs
- -Browser inconsistencies
- -Security risks if not handled properly
- -Can be slow for CPU-intensive tasks
TypeScript Pros
- +Catches errors at compile time
- +Better IDE support (autocomplete, refactoring)
- +Makes large codebases manageable
- +100% compatible with JavaScript
TypeScript Cons
- -Requires compilation step
- -Learning curve for type system
- -Can add verbosity
- -Build configuration complexity
Use JavaScript when...
- -Web application frontend code
- -Node.js server-side applications
- -Browser extensions
- -Mobile apps (React Native)
- -Automation scripts
Use TypeScript when...
- -Large-scale web applications
- -API development
- -React/Angular/Vue applications
- -Library and framework development