# max-mapper/yo-yo

A tiny library for building modular UI components using DOM diffing and ES6 tagged template literals

Repository: https://github.com/max-mapper/yo-yo
Canonical: https://ross.abutalabs.com/products/yo-yo
Language: JavaScript
License Family: other
Last push: 2020-12-26T06:15:56+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3827, "days_push": 2076, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1323, forks 46 (observed 2026-08-28T04:04:22.213660+00:00)

## What it is
yo-yo is a tiny JavaScript library for building modular UI components using DOM diffing (via morphdom) and ES6 tagged template literals (via bel). It follows a 'data down, actions up' pattern and powers the choo framework.

## Use cases
- build small modular UI components without React
- efficiently update DOM elements with diffing instead of a virtual DOM
- create standalone UI component modules publishable to npm
- write components using native ES6 template literals
- assemble a custom lightweight frontend framework from small modules

## When to choose
- you want a tiny (~4kb) React-style component library
- you prefer real DOM diffing over a virtual DOM
- you want to build your own framework from swappable small modules
- you need to embed UI components in standalone npm packages

## When to avoid
- you need a full-featured, actively maintained framework with large ecosystem support
- you require SSR or modern tooling integrations out of the box
- you need guaranteed long-term maintenance or a defined license
- you are starting a new large application today (consider choo or modern alternatives)

## Facets
- artifact type: library
- maturity: maintenance
- function: ui-components, frontend-framework, templating
- domain: web-development, frontend, developer-tools
- platform: browser, cross-platform
- tags: dom-diffing, tagged-template-literals, modular-ui, morphdom, choo, tiny-library, nodejs

## Member repositories
- max-mapper/yo-yo (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:22.213660+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:47:05.648829+00:00, confidence not recorded.
  - readme: https://github.com/max-mapper/yo-yo (fetched 2026-08-28T04:04:22.213660+00:00, sha 427985407dfb)
- Data as of 2026-08-30T08:39:29.467469+00:00.