Um

Minimal JavaScript UI Builder

Um, is an experimental composable UI builder that takes ideas from early hyperapp design, but does not stick to strict Elm Architecture.

Um, because you should think about NOT using it.

Features

• No Virtual Dom
• No Build System
• No Over Engineering
• ~1kb minified
• Totally INEFFICIENT rendering (at scale)

Overview

The library only has 2 functions, app() and h(), and the later is optional.

app({opts})

The app() is the builder function and takes an opts object:

Input:

Property	Default	Description
state	{}	initial data state
actions	{}	function object passed to view
view	(state, actions) => null	function that takes state and actions and returns valid dom
mount	"body"	valid query selector as mounting point

Output:

Property	Description
state([data])	state function to get or update internal data

h(tag, [...args])

The h() is an optional hypertext build utility that weighs in around ~250b and is provided as a way to build out your view markdown, but you can build your view using any method you like as long as it returns valid dom.

Example

    <script type="module">
        import {app, h} from "./um.min.js";

        const myapp = app({
            state: {name: "[Your Name Here]", job: "Developer"},
            view(state, actions) {
                return h("main", [
                    h("strong", `Greeting from ${state.name}`),
                    h("div", `Your local ${state.job}`),
                    h("div", {id: "test"}, [
                        h("h1", "Um, Hello"),
                        h("p", 21),
                        h("hr")
                    ])
                ]);
            }
        });
    </script>

Notes

WORK-IN-PROGRESS

TODO

• Remove State Helper or make better