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TiddlyWiki5/plugins/tiddlywiki/markdown/readme.tid

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title: $:/plugins/tiddlywiki/markdown/readme
This plugin provides Markdown support via the [[markdown-it|https://github.com/markdown-it/markdown-it]] parser and its associated plugins:
* markdown-it-deflist
* markdown-it-footnote
* markdown-it-ins
* markdown-it-mark
* markdown-it-sub
* markdown-it-sup
!! Compatibility Notes
* <p>A tab character in Markdown has a size of four spaces. Configure the tab size of your code editor accordingly. For example, if you use <$text text="CodeMirror"/>, it is recommended that you set $:/config/codemirror/indentUnit and $:/config/codemirror/tabSize to `4` to avoid inconsistent indentations.</p>
* <p>HTML blocks are ultimately parsed by the <$text text=WikiText/> parser: //an opening tag followed by a blank line will activate block-level parsing for its content//. When working with tags designed to contain literal content, such as `<pre>` and `<style>` tags, refrain from adding blank lines after the opening tags.</p>
* <p>You must terminate a table with either a blank line or another block-level structure.</p>
* <p>`latex-parser` in $:/config/markdown/renderWikiTextPragma is no longer required and will be ignored.</p>
* <p>Config option `linkNewWindow` is removed.</p>
!! Extending the Parser
You can extend the parser by loading additional markdown-it plugins this way:
```js
var plugin1 = require(...);
var plugin2 = require(...);
var md = $tw.Wiki.parsers["text/markdown"].prototype.md;
md.use(plugin1)
.use(plugin2, opts, ...);
```
! Plugin Configuration
<h2 style="margin-top:1.5em">~WikiText Pragma</h2>
The value of [[renderWikiTextPragma|$:/config/markdown/renderWikiTextPragma]] has been carefully tuned to properly integrate markdown with ~TiddlyWiki. Changing this setting may produce unexpected results, but the inclusion of the following parser rules should be fine:
; image
: embed images using ~TiddlyWiki's image syntax:
<p style="margin-left:1em">
```
[img[An explanatory tooltip|TiddlerTitle]]
[img width=23 class="tc-image" [https://tiddlywiki.com/fractalveg.jpg]]
```
</p>
; prettylink
: create links the ~TiddlyWiki way:
<p style="margin-left:1em">
```
[[TiddlerTitle]]
[[Displayed Link Title|Tiddler Title]]
[[TW5|https://tiddlywiki.com/]]
```
</p>
; prettyextlink
: create external links using the following syntax:
<p style="margin-left:1em">
```
[ext[Open file|index.html]]
[ext[Open file|../README.md]]
```
</p>
; wikilink
: auto-link ~CamelCase titles
; syslink
: auto-link system tiddlers
<h2 style="margin-top:1.5em">Typographical Replacements</h2>
When [[typographer|$:/config/markdown/typographer]] is enabled, markdown-it will provide these typographical replacements:
```
(c) (C) → ©
(tm) (TM) → ™
(r) (R) → ®
+- → ±
... → …
?.... → ?..
!.... → !..
????? → ???
!!!!! → !!!
,, → ,
-- → &ndash;
--- → &mdash;
```