With respect to software development, there are two ways to think about scalability.
- Performance scalability
- Productivity scalability
TypeScript is meant to address 2. Productivity scalability.
It's been agreed upon that:
- It's better enable the compiler to catch silly bugs, typos, and other errors at compile time, rather than in production at runtime.
- Tests are the best documentation possible for your code. Types are no substitute for writing tests, but they can do a good job at reducing the surface area of bugs.
- Tests also enable faster and safer refactoring. Similarly, if no tests exist, types can (at the very least) catch syntatic inaccuracies.
We've talked about it previously, but TypeScript addresses #3 of the Hard Software Problems: The Compled Domain Problem.
See also: "When to Use TypeScript", a Detailed Guide through Common Scenarios.
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