What is TypeScript? TypeScript is a ‘typed superset’ of JavaScript. Six months later, we had moved all our React-based code and all new front-end development to TypeScript, without delaying or postponing feature development. Last year, we began a small refactoring project to see if TypeScript could solve some of these issues for us. But this is exactly the position many companies find themselves in, Abacus being no exception.

Weakly-typed languages can be especially forbidding to new developers, as the application’s internal API is not self-documenting and there is no compiler to catch novice mistakes.

‘Types’ are the low-level sorts of data that programs work with, such as booleans, numbers, and functions. But JavaScript has a notoriously arcane type system, and no static type-checking, which means that large JavaScript codebases can become unwieldy and bug-prone over time. Today, JavaScript is the most commonly used programming language. Strategies for orchestrating successful refactoring projects without postponing developmentIf you develop applications for the web, chances are that you or someone on your team works with JavaScript.

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