npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

femto-fsrs

v1.0.2

Published

A minimalistic implementation of FSRS 4.5 spaced repetition algorithm

Downloads

55

Readme

Femto-FSRS

A zero dependency implementation of the FSRS 4.5 spaced repetition algorithm.

I am building this library as a replacement to SM-2 in KoalaSRS.

Demo

I made an HTML pen-and-paper demo here. You can store facts on paper and use Femto-FSRS for scheduling, just like Piotr Wozniak did in the 80s.

Features

  • Zero dependencies
  • Well annotated source code that (mostly) follows the paper.
  • Sensible defaults.

Usage

import { Grade, createDeck } from "femto-fsrs";

// === Create a new deck
const { newCard, gradeCard } = createDeck();

// === Initiate a new card with an initial grade of "GOOD":
const initialGrade = Grade.GOOD;
const myCard = newCard(initialGrade);

// === Grade the card as "easy" two days later.
//     Returns a new card that replaces the old one.
const daysSinceReview = 2;
const nextCard = gradeCard(myCard, daysSinceReview, Grade.EASY);
// The "I" attribute represents "I" like in the FSRS paper.
// It is the next review date at which the probability
// of success is 90% (assuming you used default parameters).
const nextReview = nextCard.I.toFixed(2);
// Print results:
console.log(`Card will be due for review in ${nextReview} day(s)`);

Result:

Card will be due for review in 16.63 day(s)

Installation

npm install femto-fsrs

Not Included

This is supposed to be a minimalistic library that can be used as a starting point for FSRS-enhanced apps. If you need a more full-featured offering with features like logs (so you can optimize your w param) or revert, etc.., check out ts-fsrs.

Tests

npm run test