JavaScript fantasy-land

Open-source JavaScript projects categorized as fantasy-land

Top 3 JavaScript fantasy-land Projects

  • fantasy-land

    Specification for interoperability of common algebraic structures in JavaScript

    Project mention: Functional Programming 1 | | 2023-08-16

    2. (A bit heavy on jargon)

    Note there is a python version of Ramda available on pypi and there’s a lot of FP tidbits inside JAX:

    3. (Worth making your own version if you want to learn, though)

    4. For nested data, JAX tree_util is epic: and also their curry implementation is funny:

    Anyway don’t put FP on a pedestal, main thing is to focus on the core principles of avoiding external mutation and making helper functions. Doesn’t always work because some languages like Rust don’t have legit support for currying (afaik in 2023 August), but in those cases you can hack it with builder methods to an extent.

    Finally, if you want to understand the middle of the midwit meme, check out this wiki article and connect the free monoid to the Kleene star (0 or more copies of your pattern) and Kleene plus (1 or more copies of your pattern). Those are also in regex so it can help you remember the regex symbols.

    The simplest example might be {0}^* in which case

    0: “” // because we use *

  • InfluxDB

    Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

    InfluxDB logo
  • Sanctuary

    :see_no_evil: Refuge from unsafe JavaScript

    Project mention: Ask HN: Freelancer? Seeking freelancer? (February 2024) | | 2024-02-01

    SEEKING WORK • Berlin, Germany • Remote or on-site • Software developer

    I'm a software developer with 13 years of experience. I love leveraging software to save people time. I have a background in (visual) design and consider design to be crucial to the development of all software (even software with no visible interface).

    I have deep knowledge of JavaScript. I have also worked professionally with TypeScript, Python, and Haskell. I enjoy working with HTML and CSS. I know React, and I'm looking for an opportunity to learn htmx.

    I have created Sanctuary ( and several other libraries. :)

  • Fluture

    🦋 Fantasy Land compliant (monadic) alternative to Promises

    Project mention: Ask HN: Who wants to be hired? (December 2023) | | 2023-12-01

    My name is Aldwin. I'm back-end-leaning full-stack (web-) developer with over 13 years of full time professional experience at various software development agencies. Besides that, I have years of hobby-programming and open-source experience, with Fluture[1] being my most well-received.

    I've been leading small teams for the last eight years, focusing on developer enabling work such as process management, devops, software architecture, and coaching.

    I'm very passionately in particular about functional programming, and I'm hoping to coach teams when it comes to the cross-over between functional programming and software architecture - something a lot of developers who are new to FP struggle with.

    Although I have been involved in a huge variety of software types, I'm particularly well-experienced when it comes to real-time, offline-first web-applications and real-time data processing.


NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).

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What are some of the best open-source fantasy-land projects in JavaScript? This list will help you:

Project Stars
1 fantasy-land 10,029
2 Sanctuary 3,028
3 Fluture 2,474

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