deno VS typescript-language-server

NodeJS is the dominant Javascript server runtime environment for Javascript and Typescript (sort of) projects. But over the years, we have seen several attempts to build alternative runtime environments such as Deno and Bun, today’s subject, among others.

https://github.com/denoland/deno/issues is the ideal place -- we try to triage all incoming issues, the more specific the repro the easier it is to address but we will take a look at everything that comes in.

Install Node.js (or Bun, or Deno, or whatever JS runtime you prefer) if it's not there

QUIC is very exciting, after seeing what it can do for performance in Cloudflare network and Cloudflare workers, I can't wait to finally see it in Deno[0] 1.41.

[0] https://github.com/denoland/deno/pull/21942#issuecomment-192...

So as an end user it's kind of like https://deno.com/ where you buy into a runtime + comes prepacked with DBs (k/v stores), scheduling, and deploy stuff?

> by storing Unison code in a database, keyed by the hash of that code, we gain a perfect incremental compilation cache which is shared among all developers of a project. This is an absolutely WILD feature, but it's fantastic and hard to go back once you've experienced it. I am basically never waiting around for my code to compile - once code has been parsed and typechecked once, by anyone, it's not touched again until it's changed.

Interesting. Whats it like upgrading and managing dependencies in that code? I'd assume it gets more complex when it's not just the Union system but 3rd party plugins (stuff interacting with the OS or other libs).

~90MB+ at this stage and do now allow compression without erroring out. Deploying ala Golang is not feasible at that level but could well be down the line if this dev branch is picked up again!

The exe output grew from from ~50MB to plus ~90MB from 2021 to 2024: https://github.com/denoland/deno/discussions/9811 which mean Deno is worse than Node.js's pkg solution by a decent margin.

Behind the scenes is a simple Sveltekit-powered server function to fetch a Spotify client token then find a user's recommendation playlist and its track information. A Deno edge function to performs this data fetch and renders server-side Svelte.

If your application is written in JavaScript, integrating it with JavaScript extensions is a no-brainer. However, Secutils.dev is entirely written in Rust. How would I even begin? Fortunately, I recently came across an excellent blog post series explaining how to implement your JavaScript runtime in a Rust application with Deno:

Besides the features TypeScript itself proposed, the most important thing it brought to the community was the ability to create cool features around this compiler that enhance the developer experience and productivity. Tools like tsserver, pretty ts errors, and many others are actively improving the ecosystem for both JavaScript and TypeScript writers.

Sometimes a language server can support multiple filetypes. An example of this is tsserver, the language server for javascript and typescript. In this case a filetype plugin can still work but there is an easier way to go about it.

in this way the ts server can detect and parse the component from the microfronent, thanks to monorepos!

That was interesting, thanks for pointing it out

I was tremendously sad to see that the Typescript Language Server wasn't owned by Microsoft <https://microsoft.github.io/language-server-protocol/impleme...>, since if there was any sanity in the world a spec bump would travel with a reference implementation showing how they envision such a thing being used

But, I found that the Typescript Language Server that they did list does indeed have a semantic-tokens module in it, although it's much shorter than I would have expected from reading that section in the spec: https://github.com/typescript-language-server/typescript-lan...

I would like to use svelte language server when working on +page.server.ts files and not the typescript language server.

[[language]] name = "python" roots = ["pyproject.toml"] formatter = { command = "black", args = ["--quiet", "-"] } language-server = { command = "pyright-langserver", args = ["--stdio"] } config = {} auto-format = true [[language]] name = "rust" auto-format = true # [[language]] # name = "typescript" # auto-format = true # formatter = { command = "prettier", args = ["--parser", "typescript"]} # # pass format options according to https://github.com/typescript-language-server/typescript-language-server#workspacedidchangeconfiguration omitting the "[language].format." prefix. # config = { format = { "semicolons" = "insert", "insertSpaceBeforeFunctionParenthesis" = true } } [[language]] name = "tsx" formatter = { command = 'prettier', args = ["--parser", "typescript"] } auto-format = true [[language]] name = "javascript" auto-format = true formatter = { command = 'npx', args = ["prettier", "--config", ".prettierrc", "--parser", "javascript"] } # formatter = { command = "prettier", args = ["--parser", "javascript"]} [[language]] name = "css" formatter = { command = 'prettier', args = ["--parser", "css"] } [[language]] name = "markdown" # https://github.com/executablebooks/mdformat formatter = { command = "mdformat", args = ["-"] } [[language]] name = "json" formatter = { command = "prettier", args = ["--parser", "json"] } [[language]] name = "toml" auto-format = true # https://github.com/bd82/toml-tools/tree/master/packages/prettier-plugin-toml formatter = { command = "prettier", args = ["--parser", "toml"] } [[language]] name = "yaml" indent = { tab-width = 2, unit = " " } formatter = { command = "prettier", args = ["--parser", "yaml"] } [[language]] name = "astro" scope = "source.astro" injection-regex = "astro" file-types = ["astro"] roots = ["package.json", "astro.config.mjs"] language-server = { command = "astro-ls", args = ["--stdio"] } config = { "typescript" = { serverPath = "/Users/matteostara/.nvm/versions/node/v18.16.0/bin/typescript-language-server" }, "environment" = "node" }

Depending on the language server version, you may be running into https://github.com/typescript-language-server/typescript-language-server/issues/631. I temporarily fixed it for me by simply sticking with an old enough server build, though judging by the latest typescript-language-server commits a very recent build from master should also work

Before, I was using typescript-language-server as it is LSP compliant but it was slow and lacks the features of what VSCode's implementation has, like extracting functions, constants, types into interfaces or alias and single imports. Auto-completion was also not very predictive as sometimes it works and sometimes it doesn't. For instance, I was having trouble getting it to auto-complete common attributes like className or href in JSX projects. It could be that I may be doing something wrong but didn't find any solution on how to get it properly working.

Then this is highly likely issue of typescript-language-server. You might consider opening an issue for it.