ArtHtmlFactory

Generate HTML with an easy, declarative syntax.

Examples

import &ArtHtmlFactory

# Example: tag properties
tree = Div
  class: :foo
  id:    :123

tree.toString()
# > "<DIV class='foo' id='123'></DIV>"

Examples

import &ArtHtmlFactory

# Example: 4 text and 2 non-text children
Span
  ""      This is some really
  B  ""   bold
  ""      text.
  ""      Also, here is some
  Em ""   emphasized
  ""      text.

# Example: internalHtml adds a string
# without interpretation.
Span
  internalHtml: ""
    Or you can do <b>this</b>
    and <em>this</em>.

# With CaffeineScript literals,
# setting CSS styles is easy.
Div
  style:
    bottom:          0
    height:          50px
    left:            100px
    right:           100px
    position:        :fixed
    backgroundColor: :white
    textAlign:       :center
  "" Custom Styles are easy, too.


# Example: Reusable styles without stylesheets:
myTextStyle =
  style:
    fontSize:   16pt
    color:      #444
    fontFamily: :Times

myLayoutStyle
  style:
    padding:    10pt

Div
  myTextStyle
  myLayoutStyle
  ""
    All plain object children are merged into
    the element's props.

TypeScript Support

ArtHtmlFactory provides full TypeScript type definitions. Each HTML tag (e.g. Div, Span, Body) is typed as an HtmlFactory function returning an object that can be turned into a string with .toString() or .toCompactString(). You can pass any combination of:

• Primitives (string, number, boolean)
• Objects (merged into HTML attributes; style is special)
• Arrays (automatically flattened)
• null/undefined (ignored)

Merging Rules

Properties:

• Later properties override earlier ones.
• A property set to null removes it.
• A property set to undefined is simply ignored.
• When generating the HTML:
  • false, undefined and 'null' properties are not output: Div({bar: false}) => <div>
  • true is output as just the tag with no value: Div({bar: true}) => <div bar>
  • 0 and other numbers are output as strings: Div({foo: 0}) => <div foo="0">

Div(
  { width: '100px' },
  { width: '200px' } // overrides the first width
);

Div(
  { width: '100px' },
  { width: null } // removes width
);

The Style Property

For style, strings are allowed but objects are recommended so they can be merged correctly. Multiple style objects get merged, with later keys overriding earlier ones. Keys in style objects become dash-case in the final HTML.

Div(
  { style: { backgroundColor: 'red' } },
  { style: { color: 'white' } }
);
// => style="background-color:red;color:white"

Example: A Todo List

You can create reusable "components" by defining helper functions returning arrays of ArtHtmlFactory objects, then use them in your main function.

import { Div, Ul, Li, Span } from "art-html-factory";

const TodoItem = (title: string) => [
  Span({ style: { fontWeight: "bold" } }, title),
];

export const TodoList = (items: string[]) =>
  Div(
    { style: { margin: "10px" } },
    Ul(items.map((item) => Li(TodoItem(item))))
  );

console.log(TodoList(["Buy milk", "Clean house"]).toString());