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• pica - high quality and fast image resize in browser.
• babelfish - developer friendly i18n with plurals support and easy syntax.

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h1 Heading 8-)

h2 Heading

h3 Heading

h4 Heading

h5 Heading

h6 Heading

Horizontal Rules

Typographic replacements

Enable typographer option to see result.

(c) (C) (r) (R) (tm) (TM) (p) (P) +-

test.. test... test..... test?..... test!....

!!!!!! ???? ,, -- ---

"Smartypants, double quotes" and 'single quotes'

Emphasis

This is bold text

This is bold text

This is italic text

This is italic text

Strikethrough

Blockquotes

Blockquotes can also be nested...

...by using additional greater-than signs right next to each other...

...or with spaces between arrows.

Lists

Unordered

• Create a list by starting a line with +, -, or *
• Sub-lists are made by indenting 2 spaces:
  • Marker character change forces new list start:
    • Ac tristique libero volutpat at
    • Facilisis in pretium nisl aliquet
    • Nulla volutpat aliquam velit
• Very easy!

Ordered

1. Lorem ipsum dolor sit amet
2. Consectetur adipiscing elit
3. Integer molestie lorem at massa

1. You can use sequential numbers...
2. ...or keep all the numbers as 1.

Start numbering with offset:

57. foo
58. bar

Code

Inline code

Indented code

// Some comments
line 1 of code
line 2 of code
line 3 of code

Block code "fences"

Sample text here...

Syntax highlighting

var foo = function (bar) {
  return bar++;
};

console.log(foo(5));

Tables

Right aligned columns

Links

link text

link with title

Autoconverted link https://github.com/nodeca/pica (enable linkify to see)

Images

Like links, Images also have a footnote style syntax

With a reference later in the document defining the URL location:

Plugins

The killer feature of markdown-it is very effective support of syntax plugins.

Emojies

Classic markup: :wink: :crush: :cry: :tear: :laughing: :yum:

Shortcuts (emoticons): :-) :-( 8-) ;)

see how to change output with twemoji.

Subscript / Superscript

• 19^th^
• H~2~O

<ins>

++Inserted text++

<mark>

==Marked text==

Footnotes

Footnote 1 link^first.

Footnote 2 link^second.

Inline footnote^[Text of inline footnote] definition.

Duplicated footnote reference^second.

Definition lists

Term 1

: Definition 1 with lazy continuation.

Term 2 with inline markup

: Definition 2

    { some code, part of Definition 2 }

Third paragraph of definition 2.

Compact style:

Term 1 ~ Definition 1

Term 2 ~ Definition 2a ~ Definition 2b

Abbreviations

This is HTML abbreviation example.

It converts "HTML", but keep intact partial entries like "xxxHTMLyyy" and so on.

*[HTML]: Hyper Text Markup Language

Custom containers

::: warning here be dragons :::

This is a TiddlyWiki plugin for mathematical and chemical typesetting based on KaTeX from Khan Academy.

It is completely self-contained, and doesn't need an Internet connection in order to work. It works both in the browser and under Node.js.

! Installation

To add the plugin to your own TiddlyWiki5, just drag this link to the browser window:

[[$:/plugins/tiddlywiki/katex]]

! Using KaTeX

The usual way to include ~LaTeX is to use $$, as shown in the examples below.

The underlying KaTeX widget is provided under the name <$latex> and is also available under the alias <$katex>. It's better to use the generic <$latex> name unless you are running multiple ~LaTeX plugins and wish to specifically target KaTeX.

! Examples - mathematical typesetting

These examples are taken from [ext[http://khan.github.io/KaTeX/]]

!! Example 1

If the text between $$ contains newlines it will rendered in display mode:

$$
f(x) = \int_{-\infty}^\infty\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi
$$

$$ f(x) = \int_{-\infty}^\infty\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi $$

!! Example 2

$$
\frac{1}{\Bigl(\sqrt{\phi \sqrt{5}}-\phi\Bigr) e^{\frac25 \pi}} = 1+\frac{e^{-2\pi}} {1+\frac{e^{-4\pi}} {1+\frac{e^{-6\pi}} {1+\frac{e^{-8\pi}} {1+\cdots} } } }
$$

$$ \frac{1}{\Bigl(\sqrt{\phi \sqrt{5}}-\phi\Bigr) e^{\frac25 \pi}} = 1+\frac{e^{-2\pi}} {1+\frac{e^{-4\pi}} {1+\frac{e^{-6\pi}} {1+\frac{e^{-8\pi}} {1+\cdots} } } } $$

!! Example 3

$$
1 +  \frac{q^2}{(1-q)}+\frac{q^6}{(1-q)(1-q^2)}+\cdots = \prod_{j=0}^{\infty}\frac{1}{(1-q^{5j+2})(1-q^{5j+3})}, \quad\quad \text{for }\lvert q\rvert<1.
$$

$$ 1 + \frac{q^2}{(1-q)}+\frac{q^6}{(1-q)(1-q^2)}+\cdots = \prod_{j=0}^{\infty}\frac{1}{(1-q^{5j+2})(1-q^{5j+3})}, \quad\quad \text{for }\lvert q\rvert<1. $$

!! Widget Example

For more flexibility the KaTeX widget can also be used via the full widget syntax:

<$latex text="f(x) = \int_{-\infty}^\infty\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi" displayMode="true"></$latex>

<$latex text="f(x) = \int_{-\infty}^\infty\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi" displayMode="true"></$latex>

! ''Error Handling''

Any LaTeX syntax errors are flagged with the problematic syntax highlighted. For example:

$$ f(x) = \int_{-\infty}^\infinity\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi $$

$$ f(x) = \int_{-\infty}^\infinity\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi $$

! Examples - chemical typesetting

These examples are taken from [ext[https://mhchem.github.io/MathJax-mhchem/]]

!! Example 1

$$
\ce{CO2 + C -> 2 CO}
$$

$$ \ce{CO2 + C -> 2 CO} $$

!! Example 2

$$
\ce{Hg^2+ ->[I-] HgI2 ->[I-] [Hg^{II}I4]^2-}
$$

$$ \ce{Hg^2+ ->[I-] HgI2 ->[I-][Hg^{II}I4]^2-} $$

!! Example 3

$$
\ce{x Na(NH4)HPO4 ->[\Delta] (NaPO3)_x + x NH3 ^ + x H2O}
$$

$$ \ce{x Na(NH4)HPO4 ->[\Delta] (NaPO3)_x + x NH3 ^ + x H2O} $$

!! Example 4

$$
\ce{A\bond{~--}B\bond{~=}C\bond{-~-}D}
$$

$$ \ce{A\bond{~--}B\bond{~=}C\bond{-~-}D} $$

!! Example 5

$$
\ce{Li^x_{Li,1-2x}Mg^._{Li,x}$V$'_{Li,x}Cl^x_{Cl}}
$$

$$ \ce{Li^x{Li,1-2x}Mg^.{Li,x}$V$'{Li,x}Cl^x{Cl}} $$

!! Example 6

$$
\ce{Zn^2+  <=>[+ 2OH-][+ 2H+]  $\underset{\text{amphoteres Hydroxid}}{\ce{Zn(OH)2 v}}$  <=>[+ 2OH-][+ 2H+]  $\underset{\text{Hydroxozikat}}{\ce{[Zn(OH)4]^2-}}$}
$$

$$ \ce{Zn^2+ <=>[+ 2OH-][+ 2H+] $\underset{\text{amphoteres Hydroxid}}{\ce{Zn(OH)2 v}}$ <=>[+ 2OH-][+ 2H+] $\underset{\text{Hydroxozikat}}{\ce{[Zn(OH)4]^2-}}$} $$