In this blog post, we take a closer look at TypeScript enums: How do they work? What are their use cases? What are the alternatives if we don’t want to use them? The blog post concludes with recommendations for what to use when.

2ality – JavaScript and more

21.01.2025

ECMAScript proposal: RegExp escaping

The ECMAScript proposal “RegExp escaping” (by Jordan Harband and Kevin Gibbons) specifies a function RegExp.escape() that, given a string text, creates an escaped version that matches text – if interpreted as a regular expression. This proposal is currently at stage 3.

2ality – JavaScript and more

25.01.2025

Template literal types in TypeScript: parsing during type checking and more

In this blog post, we take a closer look at template literal types in TypeScript: While their syntax is similar to JavaScript’s template literals, they operate at the type level. Their use cases include: Static syntax checking for string literals Transforming the casing of property names (e.g. from hyphen case to camel case) Concisely specifying large string literal union types

2ality – JavaScript and more

30.01.2025

Computing with tuples in TypeScript

JavaScript’s Arrays are so flexible that TypeScript provides two different kinds of types for handling them: Array types for arbitrary-length sequences of values that all have the same type – e.g.: Array<string> Tuple types for fixed-length sequences of values where each one may have a different type – e.g.: [number, string, boolean] In this blog post, we look at the latter – especially how to compute with tuples at the type level.

home›2ality – JavaScript and more

2ality – JavaScript and more

Software

TypeScript enums: use cases and alternatives

ECMAScript proposal: RegExp escaping

Template literal types in TypeScript: parsing during type checking and more

Computing with tuples in TypeScript

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