Listdown

A ~~horribly-named~~ simple markup language for lists.

Syntax

Full example

This is an example using all possible elements (tabs represented by »):

Hello, I'm a list!
======
Item 1
»   Item 1.1
»   Item 1.2
»   »   Item 1.2.1
»   »   Item 1.2.2
»   »   Item 1.2.3 // hello, I'm a comment
»   Item 1.3
Item 2
Item 3

I'm another list
======
Item a
Item b
Item c

List name

Text followed by a line break, then 3 or more dashes or 3 or more equal signs:

For instance:

Hello!
===

Hello!
---

Hello!
==================

Hello!
------------------

Regex: (.*)\n[-|=]{3,}

List items

Tree structured using tabs or 4 spaces

For instance (tabs represented by »):

Item 1
»   Item 1.1
»   Item 1.2
»   »   Item 1.2.1
»   »   Item 1.2.2
»   »   Item 1.2.3
»   Item 1.3
Item 2
Item 3

or (spaces represented by ·):

Item 1
····Item 1.1
····Item 1.2
········Item 1.2.1
········Item 1.2.2
········Item 1.2.3
····Item 1.3
Item 2
Item 3

Regex (maybe): ^(?!.*\n---|---|.*\n===|===).*$

Comments

Comments are preceded two forward slashes:

// hello, I'm a comment

There is no multi-line comment block.

Parsing

There is an example implementation in /dist/ (global/for the browser).

Usage is as follows (also see parse.html):

<textarea id="listdown_code"><!-- text to be parsed --></textarea>
<div id="parsed"></div>

<script src="dist/listdown.js"></script>
<script>
	var text = document.getElementById('listdown_code').value;

	var parsed = Listdown.parse(text);
	
	var arr = parsed.toArray(); // array of objects
	var json = parsed.toJSON();
	var html = parsed.toHTML({
		headingLevel: 3
	});
	
	// you can also chain methods:
	var html = Listdown.parse(text).toHTML();
	document.getElementById('parsed').innerHTML = html;
</script>