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Skooma

import {html} from "skooma.js"

A functional-friendly helper library for procedural DOM generation and templating.

Overview

document.body.append(html.div(
    html.h1("Hello, World!"),
    html.p("Skooma is cool", {class: "amazing"}),
    html.button("Show Proof", click: event => { alert("It's true!") })
))

Interface / Examples

HTML generation

html.div()
// Creates a <div></div> element
html.div("hello", "world")
// <div>helloworld</div>
html.div(html.span())
// <div><span></span></div>
html.div([html.span(), html.span()])
// <div> <span></span> <span></span> </div>
html.div({class: "foo"})
// <div class="foo"></div>
html.div({class: ["foo", "bar"]})
// <div class="foo bar"></div>
html.div({click: 1})
// <div click="1"></div>
html.div({click: event => console.log(event.target)})
// Creates a <div> with an event listener for "click" events
html.div(player: {username: "KhajiitSlayer3564"})
// Creates a <div> with the attribute "player" set to a JSON-encoded Object
html.div("Old content", self => self.innerText = "Hello, World!")
// Creates a <div> and passes it to a function for further processing
html.div({foo: true})
// <div foo></div>
html.div({foo: "bar"}, {foo: false})
// <div></div>

// Special keys:

html.div({dataset: {foo: 1, bar: 2}})
// <div data-foo="1" data-bar="2"></div>

html.div({shadowRoot: html.span("Shadow root content")})
// Attaches a shadow root with a span

Generators can be called with many arguments. Arrays get iterated recursively as if they were part of a flat argument list.

Generating Text Nodes

text("Hello, World")
// Wraps document.createTextNode
text()
// Defaults to empty string instead of erroring
text(null)
// Non-string arguments still error

text`Hello, World!`
// returns a new document fragment containing the text node "Hello, World!"
text`Hello, ${user}!`
// returns a document fragment containing 3 nodes:
// "Hello, ", the interpolated value of `user` and "!"
text`Hello, ${html.b(user)}!`
// Text node for Hello, the <b> tag with the user's name, and a text node for !

handle

import {handle} from 'skooma.js'

Since it is common for event handlers to call preventDefault(), skooma provides a helper function called handle with the following definition:

fn => event => { event.preventDefault(); return fn(event) }

A few more examples:

Create a Button that deletes itself:

document.body.append(
	html.button("Delete Me", {click: event => event.target.remove()})
)

Turn a two-dimensional array into an HTML table:

const table = rows =>
	html.table(html.tbody(rows.map(
		row => html.tr(row.map(
			cell => html.rd(cell, {dataset: {
				content: cell.toLowerCase(),
			}})
		))
	)))

A list that you can add items to

let list, input = ""
document.body.append(html.div([
	list=html.ul(),
	html.input({type: 'text', input: e => input = e.target.value}),
	html.button({click: event => list.append(html.li(input))}, "Add"),
]))

A list that you can also delete items from

const listItem = content => html.li(
	html.span(content), " ", html.a("[remove]", {
		click: event => event.target.closest("li").remove(),
		style: { cursor: 'pointer', color: 'red' },
	})
)
let list, input = ""
document.body.append(html.div([
	list=html.ul(),
	html.input({type: 'text', input: e => input = e.target.value}),
	html.button({click: event => list.append(listItem(input))}, "Add"),
]))

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