(2) The
IDeref
interface is implemented by various data structures in the
thi.ng/umbrella eco system (most relevant:
@thi.ng/rstream,
@thi.ng/atom).

Status

STABLE - used in production

Search or submit any issues for this package

The current aim is not necessarily to have wrappers for each possible
HTML5 element, but certainly to support the most commonly used ones. PRs
welcome!

Support packages

- @thi.ng/hiccup-html-parse - Well-formed HTML parsing and customizable transformation to nested JS arrays in @thi.ng/hiccup format

Related packages

- @thi.ng/hdom - Lightweight vanilla ES6 UI component trees with customizable branch-local behaviors
- @thi.ng/rdom - Lightweight, reactive, VDOM-less UI/DOM components with async lifecycle and @thi.ng/hiccup compatible
- @thi.ng/hiccup-svg - SVG element functions for @thi.ng/hiccup & related tooling

Installation

``bash
yarn add @thi.ng/hiccup-html
`

ESM import:

`ts
import * as html from "@thi.ng/hiccup-html";
`

Browser ESM import:

`html

`

JSDelivr documentation

Package sizes (brotli'd, pre-treeshake): ESM: 1.63 KB

Dependencies

- @thi.ng/api

Note: @thi.ng/api is in _most_ cases a type-only import (not used at runtime)

Usage examples

33 projects in this repo's
/examples
directory are using this package:

| Screenshot | Description | Live demo | Source |
|:----------------------------------------------------------------------------------------------------------------------------|:--------------------------------------------------------------------------------------------------------|:----------------------------------------------------------|:---------------------------------------------------------------------------------------|
| | Large ASCII font text generator using @thi.ng/rdom | Demo | Source |
| | Figlet-style bitmap font creation with transducers | Demo | Source |
| | Interactive & reactive image blurhash generator | Demo | Source |
| | Self-modifying, animated typographic grid with emergent complex patterns | Demo | Source |
| | Tool to interactively compute & visualize color contrasts against WCAG threshold | Demo | Source |
| | Probabilistic color theme generator | Demo | Source |
| | CSP channel-based event handling, async transducers & reactive UI components | Demo | Source |
| | Color palette generation via dominant color extraction from uploaded images | Demo | Source |
| | Randomized space-filling, nested grid layout generator | Demo | Source |
| | Browser REPL for a Lispy S-expression based mini language | Demo | Source |
| | Mastodon API feed reader with support for different media types, fullscreen media modal, HTML rewriting | Demo | Source |
| | Basic thi.ng/meta-css usage & testbed | Demo | Source |
| | Parser grammar livecoding editor/playground & codegen | Demo | Source |
| | Randomized 4-point 2D color gradient image generator | Demo | Source |
| | Interactive pixel sorting tool using thi.ng/color & thi.ng/pixel | Demo | Source |
| | RGB waveform image analysis | Demo | Source |
| | Procedural stochastic text generation via custom DSL, parse grammar & AST transformation | Demo | Source |
| | rdom drag & drop example | Demo | Source |
| | Basic usage of the declarative rdom-forms generator | Demo | Source |
| | rstream & transducer-based FSM for converting key event sequences into high-level commands | Demo | Source |
| | rdom & hiccup-canvas interop test | Demo | Source |
| | Basic thi.ng/router usage with thi.ng/rdom components | Demo | Source |
| | Full umbrella repo doc string search w/ paginated results | Demo | Source |
| | Defining & using basic Web Components (with shadow DOM) via @thi.ng/rdom & @thi.ng/meta-css | Demo | Source |
| | Responsive image gallery with tag-based Jaccard similarity ranking | Demo | Source |
| | Generative audio synth offline renderer and WAV file export | Demo | Source |
| | Declarative component-based system with central rstream-based pubsub event bus | Demo | Source |
| | Responsive & reactively computed stacked column layout | Demo | Source |
| | SVG path parsing & dynamic resampling | Demo | Source |
| | Tree-based UI to find & explore thi.ng projects via their associated keywords | Demo | Source |
| | thi.ng/rdom & thi.ng/rstream based quiz to guess thi.ng package names | Demo | Source |
| | Multi-layer vectorization & dithering of bitmap images | Demo | Source |
| | rdom & WebGL-based image channel editor | Demo | Source |

API

Generated API docs

`ts
import { div, label, option, select } from "@thi.ng/hiccup-html";
import { $compile } from "@thi.ng/rdom";

const choices = [
["#f00", "Red"],
["#ff0", "Yellow"],
["#0f0", "Green"],
["#0ff", "Cyan"],
["#00f", "Blue"],
["#f0f", "Magenta"],
];

$compile(
div(
null,
label({ for: "colors" }, "Fave color: "),
select(
{
id: "colors",
onchange: (e) => alert((e.target).value),
},
option(null, "Please choose..."),
...choices.map((x) => option({ value: x[0] }, x[1]))
)
)
).mount(document.body);
`

$3

All element functions are created via the higher-order function defElement
which produces the typed, variadic factories. defElement takes an element name
and optional set of default attributes. It also uses generics to enforce types
for the element's attributes (default:
Attribs
and/or children/body (default: any).

Define element with defaults:

`ts
import { defElement } from "@thi.ng/hiccup-html";

const el = defElement("tag")
`

Define with custom attribs & no children allowed:

`ts
import { Attribs, AttribVal, defElement } from "@thi.ng/hiccup-html";

// extend global HTML default attribs
interface MyAttribs extends Attribs {
class: AttribVal;
width: AttribVal;
height: AttribVal;
}

// provide type constraints and default attribs
const el = defElement, never>(
"tag",
{ width: 100, height: 100 }
);

// or create new versions of existing elements with more limited
// user customization options...
const div = defElement>>("div");
`

The Attribs interface provides a common, fully typed base definition
of HTML attributes (incl. event listeners and enumerated attrib options)
and can be found in
api.ts.

The AttribVal type wrapper is used to allow for reactive attribute
values (in
@thi.ng/rdom)
and IDeref
instances
when later providing attribute values to an element.

#### Element creation

The function returned by defElement has the following
signatures:

`ts
(attribs?: Nullable, ...body: B[]) => [string, Nullable, ...B[]];

(emmet: string, attribs?: Nullable, ...body: B[]) => [string, Nullable, ...B[]];
`

The result of either form is a simple tuple, defining an HTML element in
@thi.ng/hiccup
syntax.

If the second call signature is used, the initial emmet-style string
will be appended to the tag name and merely acts as syntax sugar for
providing an element ID and/or CSS classes.

`ts
import { defElement } from "@thi.ng/hiccup-html";

const el = defElement("a");
`

| Call | Result |
|-----------------------------------|----------------------------------|
| el() | ["a", null] |
| el(null) | ["a", null] |
| el(null, "body") | ["a", null, "body"] |
| el({ c: 2 }) | ["a", { c: 2 }] |
| el({ c: 2 }, "body") | ["a", { c: 2 }, "body"] |
| el("#id.foo") | ["a#id.foo", null] |
| el("#id.foo", { c: 2 }) | ["a#id.foo", { c: 2 }] |
| el("#id.foo", { c: 2 }, "body") | ["a#id.foo", { c: 2 }, "body"] |
| el("#id.foo", null, "body") | ["a#id.foo", null, "body"] |

`ts
import { defElement } from "@thi.ng/hiccup-html";

// with default attribs
const el = defElement("a", { b: 1 });
`

| Call | Result |
|-----------------------------------|----------------------------------------|
| el() | ["a", { b: 1 }] |
| el(null) | ["a", { b: 1 }] |
| el(null, "body") | ["a", { b: 1 }, "body"] |
| el({ c: 2 }) | ["a", { b: 1, c: 2 }] |
| el({ c: 2 }, "body") | ["a", { b: 1, c: 2 }, "body"] |
| el("#id.foo") | ["a#id.foo", { b: 1 }] |
| el("#id.foo", { c: 2 }) | ["a#id.foo", { b: 1, c: 2 }] |
| el("#id.foo", { c: 2 }, "body") | ["a#id.foo", { b: 1, c: 2 }, "body"] |
| el("#id.foo", null, "body") | ["a#id.foo", { b: 1 }, "body"] |

Authors

- Karsten Schmidt

If this project contributes to an academic publication, please cite it as:

`bibtex
@misc{thing-hiccup-html,
title = "@thi.ng/hiccup-html",
author = "Karsten Schmidt",
note = "https://thi.ng/hiccup-html",
year = 2020
}
``

License

© 2020 - 2026 Karsten Schmidt // Apache License 2.0