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TypeScript ​

ScriptingStaticGC

JavaScript extended with a structural type system — now the default for large-scale web development. Adds significant surface area over JavaScript (90 vs 70 concepts), mostly in the type system category. Benchmarks show slightly more ceremony than JavaScript but substantially better safety from compile-time type checking.

Quality
QualityQuality — Fewer Lines: 24Quality — Fewer Concepts: 10Quality — Low Noise: 0.5Quality — Safe: 3.3Quality — Lightweight: 0.2Quality — Info per Line: 3.8Fewer LinesFewer ConceptsLow NoiseSafeLightweightInfo per Line
Concept Distribution
Concept DistributionConcept Distribution — Types: 22Concept Distribution — Control: 10Concept Distribution — Functions: 12Concept Distribution — OOP/Data: 14Concept Distribution — Memory: 2Concept Distribution — Concurrency: 10Concept Distribution — Metaprog: 14Concept Distribution — Errors: 16TypesControlFunctionsOOP/DataMemoryConcurrencyMetaprogErrors
Safety3.3 / 5
Memory
Compile-time
GC + no raw pointers prevent memory corruption
Null
Compile-time (opt-in)
strictNullChecks available but not default in all configs
Data Races
None
Single-threaded (inherits JS event loop)
Overflow
None
Inherits JS float behavior — no integer overflow detection
Coercion
Compile-time (opt-in)
Type system catches most, but runtime is still JS
Compile-timeRuntimeOpt-inNone
How we score
Expressivenessavg across benchmarks
Lines
15.9
Verbosity
320
Ceremony
0.2
Surface Area100 concepts
67 reserved keywords
Types
22
Control
10
Functions
12
OOP/Data
14
Memory
2
Concurrency
10
Metaprog
14
Errors
16
How we measure
Explicitness
67% explicit33% implicit
67% of 100 concepts have dedicated keyword syntax. The rest are learned through documentation and practice.
AI Readiness
Type Coverage
Gradual
LLM Tokens
133.4
Tok/Line
8.4
Lower tokens = cheaper API calls. Higher type coverage = more for AI to work with.

Solutions ​

View all TypeScript solutions in the problem pages.