Which is Better JavaScript Date Manipulation Libraries?
date-fns vs js-joda
1 Year
date-fnsjs-jodaSimilar Packages:
What's JavaScript Date Manipulation Libraries?

Date manipulation libraries are essential tools in web development that help developers manage, format, and manipulate dates and times effectively. They provide a range of functionalities such as parsing, formatting, comparing, and performing arithmetic operations on dates. Using these libraries can significantly simplify the complexities associated with JavaScript's native Date object, which can be cumbersome and error-prone. The choice between libraries like date-fns and js-joda often depends on the specific needs of a project, such as performance, ease of use, and the desired level of functionality.

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date-fns25,950,18734,90322.6 MB7662 months agoMIT
js-joda39,0231,619-165 years agoBSD-3-Clause
Feature Comparison: date-fns vs js-joda

Modularity

  • date-fns: date-fns is designed with a modular architecture, allowing developers to import only the specific functions they need. This results in smaller bundle sizes and improved performance, making it a great choice for projects where minimizing load time is crucial.
  • js-joda: js-joda is a monolithic library, meaning it includes all functionalities in a single package. While this can lead to larger bundle sizes, it provides a comprehensive set of features out of the box, which can be advantageous for applications requiring extensive date manipulation.

Immutability

  • date-fns: date-fns operates on mutable Date objects, meaning that the original date can be altered. This can lead to unintended side effects if not managed carefully, especially in larger applications where state management is critical.
  • js-joda: js-joda emphasizes immutability, meaning that any operations on date and time objects return new instances rather than modifying the original. This approach helps prevent side effects and makes the library safer to use in complex applications.

Time Zone Support

  • date-fns: date-fns has limited support for time zones, primarily relying on the native Date object. For applications that require robust time zone handling, additional libraries may be necessary to complement its functionality.
  • js-joda: js-joda provides extensive support for time zones, allowing developers to handle complex date and time scenarios with ease. It adheres to the ISO-8601 standard, making it suitable for applications that require precise time zone calculations.

Localization

  • date-fns: date-fns offers built-in localization support, allowing developers to format dates according to various locales. This feature is particularly useful for applications targeting international audiences, ensuring that date formats are culturally appropriate.
  • js-joda: js-joda also supports localization, but its focus is more on adhering to the ISO-8601 standard. While it can handle localized formatting, it may require additional configuration compared to date-fns.

Learning Curve

  • date-fns: date-fns has a relatively gentle learning curve, especially for developers familiar with JavaScript's native Date object. Its straightforward API and modular approach make it easy to pick up and integrate into projects quickly.
  • js-joda: js-joda has a steeper learning curve due to its comprehensive feature set and adherence to the ISO-8601 standard. Developers may need to invest more time to understand its concepts, especially if they are not familiar with immutable data structures.
How to Choose: date-fns vs js-joda
  • date-fns: Choose date-fns if you prefer a lightweight, modular library that allows you to import only the functions you need, which can help reduce bundle size. It's ideal for projects that require straightforward date manipulation without the overhead of a full-fledged date library.
  • js-joda: Choose js-joda if you need a comprehensive and robust date and time library that adheres to the ISO-8601 standard. It is particularly useful for applications that require complex date and time calculations, time zones, and immutability.
README for date-fns

🔥️ NEW: date-fns v4.0 with first-class time zone support is out!

date-fns

date-fns provides the most comprehensive, yet simple and consistent toolset for manipulating JavaScript dates in a browser & Node.js

👉 Documentation

👉 Blog


It's like Lodash for dates

  • It has 200+ functions for all occasions.
  • Modular: Pick what you need. Works with webpack, Browserify, or Rollup and also supports tree-shaking.
  • Native dates: Uses existing native type. It doesn't extend core objects for safety's sake.
  • Immutable & Pure: Built using pure functions and always returns a new date instance.
  • TypeScript: The library is 100% TypeScript with brand-new handcrafted types.
  • I18n: Dozens of locales. Include only what you need.
  • and many more benefits
import { compareAsc, format } from "date-fns";

format(new Date(2014, 1, 11), "yyyy-MM-dd");
//=> '2014-02-11'

const dates = [
  new Date(1995, 6, 2),
  new Date(1987, 1, 11),
  new Date(1989, 6, 10),
];
dates.sort(compareAsc);
//=> [
//   Wed Feb 11 1987 00:00:00,
//   Mon Jul 10 1989 00:00:00,
//   Sun Jul 02 1995 00:00:00
// ]

The library is available as an npm package. To install the package run:

npm install date-fns --save

Docs

See date-fns.org for more details, API, and other docs.


License

MIT © Sasha Koss