proposal-pattern-matching
ts-pattern
proposal-pattern-matching | ts-pattern | |
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67 | 38 | |
5,344 | 10,907 | |
0.9% | - | |
9.0 | 8.6 | |
9 days ago | 19 days ago | |
HTML | TypeScript | |
MIT License | MIT License |
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proposal-pattern-matching
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Coming to grips with JS: a Rubyist's deep dive
Note, however, that there is a proposal to add pattern matching to JS.
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Level up your Typescript game, functionally - Part 2
There's an ECMAScript proposal that is in the works to add this feature to the language! It's going to look something like this.
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Building React Components Using Unions in TypeScript
More importantly, TypeScript typically commits to build things into itself when the proposal in JavaScript reaches Stage 3. The pattern matching proposal in JavaScript is Stage 1, but depends on many other proposals as well that may or may not need to be at Stage 3 as well for it to work. This particular proposal is interested on pattern matching on JavaScript Objects and other primitives, just like Python does with it’s native primitives. These are also dynamic types which helps in some areas, but makes it harder than others. Additionally, the JavaScript type annotations proposal needs to possibly account for this. So it’s going to be awhile. Like many years.
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Explicit Software Design. Preliminary Conclusions
For true™ functional programming in JS, native pattern matching and partial function application are missing (at least for now: 1, 2). For proper OOP, it lacks real interfaces and compile-time dependency injection.
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TypeScript Is Surprisingly OK for Compilers
The proposal for pattern matching syntax seems more akin to what they're looking for.
https://github.com/tc39/proposal-pattern-matching
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[AskJS] C# in every Node.js job posting?
There's a proposal to add something like that to JavaScript but it's been stuck in limbo since 2017 although there are libraries like ts-pattern which implement it already.
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[AskTS] What do you think will be the future of runtime type checking?
I'll admit, it is easy to assert that the TypeScript language should not be involved in the matters of packages but I also wonder if we're moving towards a point where interfaces will be as common as namespaces and whether or not it would be sensible for the language to incorporate such type assertions into the language formally, after all, it already compiles to various forms of JavaScript and there is a stage 1 proposal submitted to the TC39 committee to give JavaScript pattern matching. If adopted, wouldn't it make sense to allow TypeScript to compile a type into a type guard for the native JavaScript pattern matcher?
- Updates from the 96th TC39 meeting
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Mostly adequate guide to FP (in JavaScript)
Both are active tc39 proposals :)
https://github.com/tc39/proposal-pipeline-operator - Stage 2
https://github.com/tc39/proposal-pattern-matching - Stage 1
Hopefully we get both in the next couple of years.
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CoffeeScript for TypeScript
We often add promising TC39 proposals into Civet so people can experiment without waiting.
We've added https://github.com/tc39/proposal-pipeline-operator, a variant of https://github.com/tc39/proposal-pattern-matching, a variant of https://github.com/tc39/proposal-string-dedent and others.
Since our goal is to be 99% compatible with ES we'll need to accommodate any proposals that become standard and pick up anything TC39 leaves on the table (rest parameters in any position, etc.)
ts-pattern
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You Don't Need React
ts-pattern has been a decent band-aid for the lack of native pattern matching, but obviously has downsides that could be avoided if it was built into the language.
https://github.com/gvergnaud/ts-pattern
- Stop nesting ternaries
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Building React Components Using Unions in TypeScript
ts-pattern
- Pattern Matching Library for TypeScript
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TypeScript Is Surprisingly OK for Compilers
With how powerful the type system is you can implement pattern matching via a library pretty convincingly, https://github.com/gvergnaud/ts-pattern is definitely the go-to. That being said pattern matching is hardly a requirement for being ok for implementing compilers.
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How to achieve type safety here possible without "type hacks"?
https://github.com/gvergnaud/ts-pattern might help
- ts-pattern v5
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[AskJS] C# in every Node.js job posting?
There's a proposal to add something like that to JavaScript but it's been stuck in limbo since 2017 although there are libraries like ts-pattern which implement it already.
- Simplifying Dynamic Classes in Vue with the class-variance-authority library | cdruc.com
- Rust Appreciation Thread
What are some alternatives?
fp-ts - Functional programming in TypeScript
pattern-grab - 🤛🏻 Regular Expression Data Grabber
package.elm-lang.org - website for browsing packages and exploring documentation
ts-adt - Generate Algebraic Data Types and pattern matchers
content - The content behind MDN Web Docs
await-to-js - Async await wrapper for easy error handling without try-catch
ecma262 - Status, process, and documents for ECMA-262
union-types - A Typescript library for creating discriminating union types.
proposal-pipeline-operator - A proposal for adding a useful pipe operator to JavaScript.
ts-option
proposal-record-tuple - ECMAScript proposal for the Record and Tuple value types. | Stage 2: it will change!
typescript-coverage-report - Node command tool to generate TypeScript coverage report