mirror of https://github.com/n2geoff/um
86 lines
2.7 KiB
Markdown
86 lines
2.7 KiB
Markdown
# Um
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> Minimal JavaScript UI Builder
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Um, is an experimental composable UI builder that takes ideas from early [hyperapp](https://github.com/jorgebucaran/hyperapp) design, but does not stick to strict Elm Architecture.
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Um, because you should think about, um, NOT using it.
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## Features
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- Real DOM
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- [Non-destructive (re)Rendering](https://github.com/bryhoyt/emerj)
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- No Build System
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- No Over Engineering
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- ~2kb minified
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## Install
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Via JSDelivr CDN
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```js
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import {app,h} from "https://cdn.jsdelivr.net/gh/n2geoff/um/dist/um.min.js";
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```
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## Overview
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**Um** only has 2 exported functions, `app()` and `h()`, and the later is optional.
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### app({opts})
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The `app()` is the builder function and takes an `opts` object:
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#### Input:
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| Property | Default | Description |
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| --------- | -------------------------- | ----------------------------------------------------------- |
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| `state` | `{}` | initial data state |
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| `actions` | `{}` | function object passed to view |
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| `view` | `(state, actions) => null` | function that takes state and actions and returns valid dom |
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| `mount` | `body` | valid query selector as mounting point |
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#### Output:
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Interface with internal state for utility expansion
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| Property | Description |
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| --------------- | --------------------------------------------- |
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| `state` | internal state object |
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| `update()` | function to render dom state |
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### h(tag, [...args])
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The `h()` is an **optional** hypertext build utility that weighs in around **~250b** and is provided as *a* way to build out your `view` DOM, but you can build your `view` using any method you like as long as it returns valid DOM.
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## Example
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```html
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<script type="module">
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import {app, h} from "./um.min.js";
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const myapp = app({
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state: {name: "[Your Name Here]", job: "Developer"},
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view(state, actions) {
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return h("main", [
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h("strong", `Greeting from ${state.name}`),
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h("div", `Your local ${state.job}`),
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h("div", {id: "test"}, [
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h("h1", "Um, Hello"),
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h("p", 21),
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h("hr")
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])
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]);
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}
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});
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</script>
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```
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## Notes
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> WORK-IN-PROGRESS
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### TODO
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- Some tag attributes do not work, like rowspan on td
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- Rethink State Management, might be ok
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