es-module-shims
dayjs
es-module-shims | dayjs | |
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13 | 101 | |
1,488 | 45,835 | |
- | - | |
6.5 | 6.9 | |
14 days ago | 9 days ago | |
JavaScript | JavaScript | |
MIT License | MIT License |
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es-module-shims
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⏰ It’s time to talk about Import Map, Micro Frontend, and Nx Monorepo
For full compatibility and extra features, we usually use the library es-module-shims.
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JavaScript import maps are now supported cross-browser
You can polyfill for unsupported browsers, it works surprisingly well: https://github.com/guybedford/es-module-shims
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Modern SPAs without bundlers, CDNs, or Node.js
https://github.com/guybedford/es-module-shims has a polyfill. (But it is fairly large: 53KB raw, 15KB gzipped, 32KB minified, 11KB minified+gzipped. It’s providing a lot of likely-unnecessary functionality. I’d prefer a stripped-down polyfill that can also be lazily-loaded, controlled by a snippet of at most a few hundred bytes that you can drop into the document, only loading the polyfill in the uncommon case that it’s needed—like how five years ago as part of modernising some of the code of Fastmail’s webmail, I had it fetch and execute core-js before loading the rest iff !Object.values (choosing that as a convenient baseline), so that the cost to new browsers of supporting old browsers was a single trivial branch, and maybe fifty bytes in added payload.)
- Writing JavaScript without a build system
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Modern SPAs without bundlers, CDNs, or NodeJS
If we call the shim a framework, would you be ok with it then?
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Import maps 101
If you want import maps to be supported in any browser, there is an ES Module Shims polyfill which is compatible with any browser that has baseline ES Module Support (i.e. Edge 17+, Firefox 60+, Safari 10.1+, and Chrome 61+).
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Everything You Need to Know About JavaScript Import Maps
An example of a polyfill that can be used is the ES Module Shims polyfill that adds support for import maps and other new module features to any browser with baseline support for ES modules (about 94% of browsers). All you need to do is include the es-module-shim script in your HTML file before your import map script:
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How bad is it to not use a bundler?
i often use es-module-shims so i can load npm packages in browsers without a bundler 😎
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Fresh – The next-gen web framework
I explored using client-side service workers for build-less deployment workflows a while back, but the blocker was the initial visit when the service worker hasn't been installed yet. Ended up using es-module-shim's fetch hook (https://github.com/guybedford/es-module-shims#fetch-hook) instead, which worked quite well.
I kept the demo repo around here, in case it's helpful to anyone: https://github.com/lewisl9029/buildless-hot-reload-demo.
The repo itself is quite out of date at this point, but my current project, Reflame, is essentially the spiritual successor: https://reflame.app/
Reflame has the same ideals of achieving the developer experience I've always wanted for building client rendered React apps:
- instant production deployments (usually <200ms)
- instant preview environments that match production in pretty much every imaginable way (including the URL), that can also be flipped into development mode for fast-refresh (for the seamless feedback loop we're used to in local dev) and dev-mode dependencies (for better error messaging, etc)
- close-to-instant browser tests (1-3 seconds) that enable image snapshot comparisons that run with maximum parallelism and only rerun when their dependency graphs change
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Do you use Import-Map for your client-side ESM?
The problem of course is that browser-support for Import Maps is sadly lacking (only Chrome/Chromium-based at time of writing). There are tricks/shims to get around this, like ES-Module-Shims. I find these approaches to be a little too intrusive, personally.
dayjs
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How to parse and format a date in JavaScript
Day.js (45.3k ⭐) — A minimalist library that offers an excellent API without much overhead. It is very similar to Moment.js but much smaller in size. It also supports plugins for additional features.
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Handling dates in JavaScript with Tempo
Day.js is a lightweight alternative to the now deprecated date and time handling library, Moment.js. It is written in JavaScript and uses a similar API to Moment.js. Day.js is sufficient for date operations such as parsing, manipulation, and display. It is designed for use on both the browser and the Node.js runtime.
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JavaScript Compare Dates: From Chaos to Clarity
Day.js is awesome for comparing dates! You just need to make dayjs objects from whatever dates you have. You can use the dayjs() function with different inputs and formats. Here’s an example:
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Mastering Time: State-of-the-Art Date Handling in JavaScript
Similar API to Moment.js: Day.js provides a familiar API, making it easier for developers previously using Moment.js to transition.
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The Day.js Dilemma: How Should We Handle OSS Maintainers Going MIA?
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.
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JavaScript Libraries That You Should Know
11. DayJs
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Best date library to handle timezones in React Native?
DayJS has issues with its timezone plugin not compatible with Hermes engine https://github.com/iamkun/dayjs/issues/1942
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Everything you need to know about Date in Programming
Date.js
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Complete Tutorial: React Admin Panel with refine and daisyUI
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:
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Managify: Manage Your Teams Easily
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.
What are some alternatives?
import-maps - How to control the behavior of JavaScript imports
Luxon - ⏱ A library for working with dates and times in JS
hyperscript - Create HyperText with JavaScript.
date-fns - ⏳ Modern JavaScript date utility library ⌛️
Rust Language Server - Repository for the Rust Language Server (aka RLS)
moment - Parse, validate, manipulate, and display dates in javascript.
stampino-element
moment-timezone - Timezone support for moment.js
import-remap - Rewrite ES module import specifiers using an import-map.
countdown.js - Super simple countdowns.
mercury - A truly modular frontend framework
proposal-temporal - Provides standard objects and functions for working with dates and times.