Deno

Chat about Deno, a modern runtime for JavaScript and TypeScript.

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Deno

Chat about Deno, a modern runtime for JavaScript and TypeScript.

Join

Gary K

7/4/2025

deno fmt vs prettier

How can I use deno fmt to combine empty braces together, similar to prettier? e.g. ```...

Sebastian

7/4/2025

How can I make Vite and Deno path aliases cooperate?

I’m working on a project that uses both Deno and Vite, and I’m running into trouble getting their path alias systems to work together. For example, I have an alias like ‎~ mapped to ‎src/ in my Vite config, so imports like ‎~/integrations/query/todos.tsx work fine in the Vite dev server. However, Vite doesn’t recognize this alias, so running or linting the code with Deno fails to resolve the same imports. I’ve tried configuring aliases in both ‎vite.config.ts and ‎deno.json, but they don’t seem to share or respect each other’s settings....

Sebastian

7/4/2025

Lint does not ignore `**/*.gen.ts` files as expected

I’m trying to configure Deno’s linter to ignore all files matching ‎**/*.gen.ts. I have a hard time making it ignore generated files. Here’s the relevant part of my ‎deno.json: ``` {...

Gary K

7/4/2025

Running npm modules via deno eval, prettier vs jsvu

What is the correct way to run npm:jsvu via deno eval? fwiw, the npm prettier way is: deno eval 'import("npm:prettier/internal/cli.mjs").then(cli => cli.run(Deno.args));' -- <prettier parameters>...

Ciantic

7/3/2025

Node compat: Drizzle Kit - Dynamic require of "fs" is not supported

Try this:

import { generateDrizzleJson } from "npm:drizzle-kit/api";

import { generateDrizzleJson } from "npm:drizzle-kit/api";

...

Dustin

7/3/2025

How to `deno bundle` to single TypeScript file?

Hi there, first of all thanks a lot for this awesome project. I'm really happy to get back deno bundle. On the Blogpost https://deno.com/blog/v2.4#deno-bundle the author mentioned that deno bundle is for......

SeeringPhil

7/2/2025

Tried creating new organization(s) to test new Deploy EA... but timed out everytime

It now says that the organizations names are already in use, but I suspect it's in use by my failed attempt at creating the org. Is there a way to regain access to those ?...

绝望的生鱼片！！！！！！！！！！！！！！！！！！！！！！！！！！

6/29/2025

why my account has blocked?

I have deployed some of my application services normally and have been using them normally before. Today, it suddenly prompts that my user has been blocked. What is the reason? I did not use it to build a VPN, so why was it blocked?

exercise

6/28/2025

disable deno formatter import sorting

how??

inhago

6/28/2025

Migrate very big hybrid project to Deno

Hey folks! I'm trying to figure out if we can migrate our 6M LOC from Node to Deno. A year ago it was fully commonjs, but when I joined the company I was stupefied by that and started a project to migrate it to Typescript. Nowadays about 30% of the codebase is written in Typescript (ESM) while the rest is in Javascript (CommonJS). We currently use a mix of SWC and Babel to transpile and bundle the code and the tests. I started playing with Deno but realized it can only handle either fully CommonJS (meaning it won't recognize ESM files exist) or ESM (meaning it will break when seeing any require). That is unless I rename all thousands of JS files to .cjs in order for Deno to know that they're CommonJS. My question - is there a way to configure Deno to treat all .js files as CommonJS and all .ts files as ESM modules?...

Apollon77

6/27/2025

Finalize dgram compatibility API (add/dropMembership mainly) to allow matter.js to work

Hello everyone, my nme is Ingo and I am the lead developer fo matter.js, the Matter JavaScript SDK. We are currently trying to extend the number of JavaScript environments where matter.js runs on. Currently we are at Node.js, Bun, and also Electron seems to work. I would love to also set Deno on that list because I would assume that there are some memory footprint enhancements compared to the other ones. For this I wanted to ask if someone of the contributors would have time to look into reactivating/recreating https://github.com/denoland/deno/pull/26452 to enhance the dgram compatibility APIs - mainly in regard to add/dropMembership - because this is the main "Blocker" to also allow matter.js to be executed with Deno ... 🙂...

Quill

6/27/2025

Memory profiling

What's the best way to profile code to figure out if I'm having a deno, library or host issue? I have roughly the same code running in the browser as some dockerized deno but keep OOMing. My logs are less than useful and I'd love to figure out some memory profiling. The package I'm using is written for node and has some quirks in deno. I need to investigate if my code needs or if I need to write a formal deno package....

PirateShark

6/27/2025

Does Deno Compile Support Deno Serve --parallel?

Hi, I was reading the documentation and Deno Serve mentions the --parallel option but Deno Compile isn't very clear. It says that runtime flags can just be attached when calling compile, but --parallel is only an option for deno serve and not deno run. If I'm compiling a server calling Deno.serve, will the compiler know to automatically read executing the binary as essentially calling "deno serve" instead of calling "deno run"? Or to run deno serve in parallel are you essentially required to run it uncompiled? Might be good to add to the deno compile page either way. Thanks!...

BloxEZ

6/27/2025

Deno Aliases

When I run my tests I get the following example error:

error: Relative import path "@services/chain/types/chain_types.ts" not prefixed with / or ./ or ../
    at file:///workspaces/maicro/backend/test/1000.config.and.files/1000.config.test.ts:6:26

error: Relative import path "@services/chain/types/chain_types.ts" not prefixed with / or ./ or ../
    at file:///workspaces/maicro/backend/test/1000.config.and.files/1000.config.test.ts:6:26

...

cococore

6/26/2025

Deno.server get request ip

Last message i see in help section is about one year ago or so. And still no way to do this without brainfuck? are you serious?

Yuto Yoshino

6/26/2025

Is Deno's new Request missing implementation of Fetch Spec steps 13-21, leading to Issue #27763?

In Deno, the new Request implementation appears to be missing steps 13 to 21 as specified in the Fetch Standard. Is this intentional? I believe this is the reason behind the issue opened at https://github.com/denoland/deno/issues/27763.

Major

6/26/2025

Deno language server no longer starting. "Fatal JavaScript out of memory: Reached heap limit" error

I'm encountering an issue wherein the deno language server keeps crashing for some reason and I can't seem to figure out why

when

6/25/2025

Per user projects/deployment with subhosting

I'm interesting in trying out an application architecture where each user account gets their own personal project/deployment/database using deno deploy subhosting. When a user registers, it would create a project and deployment, with their own KV database. This would enable per user isolation and rate limiting, as well as potentially allowing per user customizations. I'm curious if anyone has tried an approach like this and how happy/successful it was and if there's any gotcha's I haven't thought about. One gotcha that I already ran into is that in the documentation, it looks like wildcard subhosting all has to go to the same deployment. So for example, if I wanted user-a.example.com and user-b.example.com as per user project/deployments it wouldn't actually work. It says "coming soon" that you'll be able to, though. I'm curious if anyone has an estimate for that as well....

Ben

6/25/2025

Failing to create a new NextJS Project

Hey, I am following the exact guide to create a nextjs app. When I start the app after full installation and not changing anything I get a hydration error. According to the internet this happened even 10 months ago I wanted to ask you if you can first replicate the issue and if so how to fix it? ...

Xiaoqiush

6/25/2025

@discordjs/rest request gets AbortError in Deno CLI

I'm building a Discord bot using @discordjs/rest inside a Deno project (via npm module). When I try to start the bot, the request to Discord API fails with this error: AbortError: The signal has been aborted...

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