dayjs VS deno

Compare dayjs vs deno and see what are their differences.

dayjs

⏰ Day.js 2kB immutable date-time library alternative to Moment.js with the same modern API (by iamkun)

deno

A modern runtime for JavaScript and TypeScript. (by denoland)
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dayjs deno
98 448
45,745 92,907
- 0.5%
6.9 9.9
6 days ago 5 days ago
JavaScript Rust
MIT License MIT License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

dayjs

Posts with mentions or reviews of dayjs. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2024-04-12.
  • The Day.js Dilemma: How Should We Handle OSS Maintainers Going MIA?
    2 projects | news.ycombinator.com | 12 Apr 2024
    As web developers, we heavily rely OSS packages. One popular example is Day.js, a JS lib for parsing, validating, manipulating, and formatting dates. It's a widely-used alternative to Moment, with over 17mil weekly downloads on npm.

    A critical bug was discovered in Day.js (see: https://github.com/iamkun/dayjs/pull/2118) causing incorrect date manipulation (add, subtract) when in UTC TZ. This could have severe implications for any project relying on Day.js for date-related functionality. However, the maintainer of the project appears to be unresponsive, leaving the bug unresolved and the future of the library uncertain.

    This raises some important questions for our community:

    - At what point should we consider a widely-used OSS project "abandoned" if the maintainer is unresponsive?

    - Is forking the project the best solution, or should we first try to reach out to the maintainer through other channels?

    - Are there established community guidelines around responsiveness expectations for widely-used OSS projects?

    - What are successful examples of community-driven forks or maintenance after a maintainer stepped away?

    I am very aware that many of these developers give their spare time for free for these projects, with little or no payment, and I am very thankful for all their work. This developer does get some money (a small amount?) through OpenCollective, and possibly also works for a company (in China?) that makes a UI library, which I think uses Day.js internally.

  • JavaScript Libraries That You Should Know
    8 projects | dev.to | 19 Mar 2024
    11. DayJs
  • Best date library to handle timezones in React Native?
    3 projects | /r/reactnative | 5 Dec 2023
    DayJS has issues with its timezone plugin not compatible with Hermes engine https://github.com/iamkun/dayjs/issues/1942
  • Everything you need to know about Date in Programming
    2 projects | dev.to | 28 Oct 2023
    Date.js
  • Complete Tutorial: React Admin Panel with refine and daisyUI
    5 projects | dev.to | 24 Oct 2023
    We have to install refine's support packages for React Table and React Hook Form. We are using Tailwind Heroicons for our icons, the Day.js library for time calculations and Recharts library to plot our charts for KPI data. So, run the following and we are good to go:
  • Managify: Manage Your Teams Easily
    6 projects | dev.to | 20 Jul 2023
    DayJS is a lightweight and fast JavaScript library for manipulating dates and times. It offers a moment.js-like API but with a much smaller footprint.
  • is there a date calculate script/libary ?
    2 projects | /r/learnjavascript | 11 Jul 2023
  • What library do you use to handle dates?
    2 projects | /r/learnjavascript | 9 Jun 2023
    I use Day.js in my projects.
  • Flash News App React Native (Expo^)
    3 projects | /r/reactnative | 5 Jun 2023
    well, I haven't reviewed the code, I just checked package.json and I'll suggest you to ditch moment.js Even the creator recommends ditching it. dayjs is a fantastic alternative.
  • How to show "Today/Tomorrow" or date using javascript?
    1 project | /r/Frontend | 19 May 2023

deno

Posts with mentions or reviews of deno. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2024-04-02.
  • Bun - The One Tool for All Your JavaScript/Typescript Project's Needs?
    4 projects | dev.to | 2 Apr 2024
    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.
  • Bun 1.1
    17 projects | news.ycombinator.com | 1 Apr 2024
    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.
  • I have created a small anti-depression script
    4 projects | dev.to | 5 Mar 2024
    Install Node.js (or Bun, or Deno, or whatever JS runtime you prefer) if it's not there
  • How QUIC is displacing TCP for speed
    1 project | news.ycombinator.com | 9 Feb 2024
    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...

  • Unison Cloud
    7 projects | news.ycombinator.com | 7 Feb 2024
    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).

  • Deno in 2023
    8 projects | news.ycombinator.com | 5 Feb 2024
    ~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.

  • Mini site for recommending songs using Svelte & Deno
    2 projects | dev.to | 3 Feb 2024
    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.
  • Supercharge your app with user extensions using Deno JavaScript runtime
    4 projects | dev.to | 24 Jan 2024
    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:
  • Deno, the next-generation JavaScript runtime
    1 project | news.ycombinator.com | 11 Jan 2024
  • Oxlint – written in Rust – 50-100 Times Faster than ESLint
    13 projects | news.ycombinator.com | 15 Dec 2023

What are some alternatives?

When comparing dayjs and deno you can also consider the following projects:

Luxon - ⏱ A library for working with dates and times in JS

ASP.NET Core - ASP.NET Core is a cross-platform .NET framework for building modern cloud-based web applications on Windows, Mac, or Linux.

date-fns - ⏳ Modern JavaScript date utility library ⌛️

typescript-language-server - TypeScript & JavaScript Language Server

moment - Parse, validate, manipulate, and display dates in javascript.

pnpm - Fast, disk space efficient package manager

moment-timezone - Timezone support for moment.js

esbuild - An extremely fast bundler for the web

countdown.js - Super simple countdowns.

bun - Incredibly fast JavaScript runtime, bundler, test runner, and package manager – all in one

proposal-temporal - Provides standard objects and functions for working with dates and times.

Koa - Expressive middleware for node.js using ES2017 async functions