proposal-pattern-matching
typescript-eslint
proposal-pattern-matching | typescript-eslint | |
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67 | 123 | |
5,344 | 14,590 | |
0.9% | 0.8% | |
9.0 | 9.9 | |
9 days ago | 5 days ago | |
HTML | TypeScript | |
MIT License | GNU General Public License v3.0 or later |
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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.)
typescript-eslint
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Mastering Type-Safe JSON Serialization in TypeScript
Typescript-eslint can assist in this task. This tool helps identify all instances of unsafe any usage. Specifically, all usages of JSON.parse can be found and it can be ensured that the received data's format is checked. More about getting rid of the any type in a codebase can be read in the article Making TypeScript Truly "Strongly Typed".
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Oxlint – written in Rust – 50-100 Times Faster than ESLint
> Only lint files that have changed? How hard that is?
Quite hard, especially since type-aware rules from e.g. https://typescript-eslint.io/ mean that changing the type of a variable in file A can break your code in file B, even if file B hasn't changed.
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How to Do a TypeScript Conversion: an opinionated take on gradual conversions
The article only touches this: when converting to TypeScript, `any` is useful, but in the end you don't want this type in your codebase - so don't forget to use typescript-eslint [0] and turn on those no-unsafe-* rules which guard against `any` leaking into your code.
[0] https://github.com/typescript-eslint/typescript-eslint
- How do I add additional rules to my typescript-eslint settings?
- What's the best config for typescript-eslint?
- How do you add angular-eslint to your typescript-eslint config?
- What's the best typescript-eslint config?
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The Best ESLint Rules for React Projects
By convention, React components should be named in PascalCase. @typescript-eslint has the config we need, and though we can't specifically target React components, we can target variables (and set some other conventions while we're at it):
- Open source public fund experiment - One and a half years update
- Never touch those //ts-ignores
What are some alternatives?
fp-ts - Functional programming in TypeScript
eslint-config-google - ESLint shareable config for the Google JavaScript style guide
package.elm-lang.org - website for browsing packages and exploring documentation
angular-eslint - :sparkles: Monorepo for all the tooling related to using ESLint with Angular
content - The content behind MDN Web Docs
ts-standard - Typescript style guide, linter, and formatter using StandardJS
ecma262 - Status, process, and documents for ECMA-262
zod - TypeScript-first schema validation with static type inference
proposal-pipeline-operator - A proposal for adding a useful pipe operator to JavaScript.
node-clinic - Clinic.js diagnoses your Node.js performance issues
proposal-record-tuple - ECMAScript proposal for the Record and Tuple value types. | Stage 2: it will change!
ts-node - TypeScript execution and REPL for node.js