content VS proposal-pattern-matching

MDN Web Docs content

In this article, we've covered the basics of character encoding in JavaScript, including the different encoding standards, how they work, and how to work with them in Node.js and web browsers. We've also covered some best practices for working with character encoding in JavaScript and provided tips and techniques for debugging encoding issues. If you want to learn more about character encoding in JavaScript, there are several resources. The Unicode Consortium's website provides detailed information about the Unicode standard, while the Mozilla Developer Network has extensive documentation on character encoding in JavaScript. Additionally, there are several books on JavaScript that cover this topic in depth, such as "JavaScript: The Definitive Guide" by David Flanagan and "Eloquent JavaScript" by Marijn Haverbeke.

Great job! You've learned all about gradients and now you can use them like a CSS expert. With these skills, you can make your websites more colorful and attractive. you can read more in MDN website.

(https://developer.mozilla.org/) MDN Web Docs is the go-to resource for comprehensive documentation on JavaScript. From beginner tutorials to advanced references, it covers everything you need to know about JavaScript, including syntax, methods, and APIs.

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MDN Web Docs MDN Web Docs is an invaluable resource for web developers. From basic syntax to advanced concepts, you'll find comprehensive documentation on HTML, CSS, JavaScript, and more.

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In Symbiote.js, almost everything you see should already be familiar to you, directly or indirectly. Unless you're new to frontend. And if you are a beginner, then you can learn the necessary basics on popular sites with documentation on modern specifications, for example MDN.

Note, however, that there is a proposal to add pattern matching to JS.

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.

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.

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.

The proposal for pattern matching syntax seems more akin to what they're looking for.

https://github.com/tc39/proposal-pattern-matching

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.

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?

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.

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.)