marktex

A full GFM implementation in javascript. Additional smart features supported and enabled by default. Live demo is available.

GFM supported, code hilighting, math supporting, task list, smarter list, para alignment.

Install

npm install marktex

Usage

Minimal usage:

console.log(marktex('**markdown** is wonderful'));
//output: <p><strong>markdown</strong> is wonderful</p>

Options and callback:

var options = {
  gfm: true,
  marktex: true
};
 
marktex('**markdown** is wonderful', options, function (err, content) {
  if (err) throw err;
  console.log(content);
});

marktex(markdownString, [options], [callback])

markdownString

Markdown string to be parsed.

options

Type: Object

Option object for marktex.

callback

Type: Function

Callback function with error-string as the first arg, parsed-content as the second arg.

Options

gfm

Type: Boolean Default: true

Enable GitHub flavored markdown.

tables

Type: Boolean Default: true

Enable GFM tables. Requires the gfm option to be true.

todo

Type: Boolean Default: true

Enable GFM todo. Requires the gfm option to be true.

highlight

Type: Function Default: null Return: string

Highlight interface, used for highlight code blocks. Takes language specification and code string, returns html. Requires the gfm option to be true.

options = {
    highlight: function(codeString, language){ return highlight(lang, code).value; }
}

breaks

Type: Boolean Default: true

Enable GFM line breaks. Requires the gfm option to be true.

marktex

Type: Boolean Default: true

Enable MarkTex, features include task-list, math interface, para-alignment, smarter list ,etc.

math

Type: Function Default: null Return: string

Math interface, used for rendering math code. Takes math code, isInline and language, returns html. Requires the marktex option to be true.

//sample
options = {
    math: function(mathString, isInline, language){
            return isInline ? '<span class="mathjax">\\('+mathString+'\\)</span>'
            :'<div class="mathjax">\\['+mathString+'\\]</div>';
            }
}

smartlist

Type: Boolean Default: false

Smarter list rendering. Different symbol in unsorted list, and consecutive \n in all list, will split lists. Requires the marktex option to be true.

smartquote

Type: Boolean Default: true

Smarter blockquote rendering. Consecutive \n will split blockquote. Requires the marktex option to be true.

align

Type: Boolean Default: true

Enable paragraph alignment. Requires the marktex option to be true.

pedantic

Type: Boolean Default: false

Conform to original markdown, do not fix any of bugs or poor behavior.

sanitize

Type: Boolean Default: false

Ignore any HTML that has been input.

smartypants

Type: Boolean Default: false

Use "smart" typograhic punctuation for things like quotes and dashes.

renderer

Type: Renderer Default: new Renderer()

A renderer instance for rendering ast to html. Learn more on the Renderer section.

Parser API

Renderer

Renderer renders tokens to html.

var r = new marktex.Renderer()
r.code = function(code, lang) {
  return highlight(lang, code).value;
}
 
console.log(marktex(text, {renderer: r}))

Block Level Renderer

• code(code, language)
• math(math, language)
• blockquote(quote)
• html(html)
• heading(text, level)
• hr()
• list(body, ordered)
• listitem(text)
• todo(body)
• todoitem(text, checked)
• paragraph(text)
• aligned_paragraph(text, alignment)
• table(header, body)
• tablerow(content)
• tablecell(content, flags)

alignment could be:

{
    align: 'center',
    indent: '2em'
}

flags could be:

{
    header: true,
    align: 'center'
}

Span Level Renderer

• strong(text)
• em(text)
• codespan(code)
• mathspan(math)
• br()
• del(text)
• link(href, title, text)
• image(href, title, text)

Lexer

Lexer produces tokens from markdown text input.

var options={};
var lexer = new marktex.BlockLexer(options);
var tokens = lexer.lex(text);
console.log(tokens);
console.log(lexer.rules);

Parser

Parser reads markdown text, outputs html. Renders and lexers can be customed within a parser.

var renderer = new marktex.Renderer();
 
renderer.heading = function(text, level) {
  return '<div class="h-' + level + '">' + text + '</div>'
}
 
var parse = function(src, options) {
  options = options || {};
  return marktex.parse(marktex.blockLex(src, options), options);
}
 
console.log(parse('# h1', {renderer: renderer}))

Thanks

A lot thanks to marked implemented by Jeffrey. Marktex is developed based on marked.