mirror of https://github.com/showdownjs/showdown
docs: update README to get rid of overlapping info from main docs
Antonio
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b64f0bea9d
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da09ee8565
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CREDITS.md
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CREDITS.md
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Credits
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=======
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- Showdown v2
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* [Estevão Santos](https://github.com/tivie)
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* [SyntaxRules](https://github.com/SyntaxRules)
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- Showdown v1
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* [Estevão Santos](https://github.com/tivie)
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* [Pascal Deschênes](https://github.com/pdeschen)
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- Showdown v0
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* [Corey Innis](http://github.com/coreyti):<br/>
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Original GitHub project maintainer
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* [Remy Sharp](https://github.com/remy/):<br/>
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CommonJS-compatibility and more
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* [Konstantin Käfer](https://github.com/kkaefer/):<br/>
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CommonJS packaging
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* [Roger Braun](https://github.com/rogerbraun):<br/>
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Github-style code blocks
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* [Dominic Tarr](https://github.com/dominictarr):<br/>
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Documentation
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* [Cat Chen](https://github.com/CatChen):<br/>
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Export fix
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* [Titus Stone](https://github.com/tstone):<br/>
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Mocha tests, extension mechanism, and bug fixes
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* [Rob Sutherland](https://github.com/roberocity):<br/>
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The idea that lead to extensions
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* [Pavel Lang](https://github.com/langpavel):<br/>
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Code cleanup
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* [Ben Combee](https://github.com/unwiredben):<br/>
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Regex optimization
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* [Adam Backstrom](https://github.com/abackstrom):<br/>
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WebKit bugfix
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* [Pascal Deschênes](https://github.com/pdeschen):<br/>
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Grunt support, extension fixes + additions, packaging improvements, documentation
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* [Estevão Santos](https://github.com/tivie)<br/>
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Bug fixing and late maintainer
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* [Hannah Wolfe](https://github.com/ErisDS)<br/>
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Bug fixes
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* [Alexandre Courtiol](https://github.com/acourtiol)<br/>
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Bug fixes and build optimization
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* [Karthik Balakrishnan](https://github.com/torcellite)<br/>
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Support for table alignment
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* [rheber](https://github.com/rheber)<br/>
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Cli
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- Original Project
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* [John Gruber](http://daringfireball.net/projects/markdown/)<br/>
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Author of Markdown
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* [John Fraser](http://attacklab.net/)<br/>
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Author of Showdown
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546
README.md
546
README.md
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@ -2,541 +2,77 @@
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[](https://automate.browserstack.com/public-build/VTIvTDNqWVdaTHljbS9RNmYrcTBiL0Uxc3dkRDhaN1dPaXpPb2VOc1B2VT0tLU1Ib09kVjVzMjhFcHExbWFSWlJEV3c9PQ==--1fb92e1730e4a00630d17d533822de6403ca65ec)
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[](http://badge.fury.io/js/showdown)
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[](http://badge.fury.io/bo/showdown)
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[](https://gitter.im/showdownjs/showdown?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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[](https://www.paypal.me/tiviesantos)
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------
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Showdown is a JavaScript Markdown to HTML converter, based on the original works by John Gruber.
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Showdown can be used client side (in the browser) or server side (with Node.js).
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## Live DEMO
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Showdown can be used on the client-side (in the browser) or server-side (with Node.js).
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Check out a live demo here: http://demo.showdownjs.com/
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----
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As you know, ShowdownJS is a free library and it will remain free forever. However, maintaining and improving the library costs time and money.
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## Live demo
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If you like our work and find our library useful, please donate through [PayPal](https://www.paypal.me/tiviesantos)! Your contribution will be greatly appreciated and help me continue to develop this awesome library.
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## License
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ShowdownJS v 2.0 is released under the MIT license.
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Previous versions are released under BSD.
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<http://demo.showdownjs.com/>
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## Who uses Showdown (or a fork)
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- [GoogleCloudPlatform](https://github.com/GoogleCloudPlatform)
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- [Meteor](https://www.meteor.com/)
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- [Stackexchange](http://stackexchange.com/) - forked as [PageDown](https://code.google.com/p/pagedown/)
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- [docular](https://github.com/Vertafore/docular)
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- [md-page](https://github.com/oscarmorrison/md-page)
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- [QCObjects](https://qcobjects.dev)
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- [and some others...](https://www.npmjs.com/browse/depended/showdown)
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* [Antmarky](https://github.com/bandantonio/antmarky)
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* [GoogleCloudPlatform](https://github.com/GoogleCloudPlatform)
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* [Meteor](https://www.meteor.com/)
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* [StackExchange](http://stackexchange.com/) - forked as [PageDown](https://code.google.com/p/pagedown/)
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* [docular](https://github.com/Vertafore/docular)
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* [md-page](https://github.com/oscarmorrison/md-page)
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* [QCObjects](https://qcobjects.dev)
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* [and some others](https://www.npmjs.com/browse/depended/showdown)
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## Installation
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## Quickstart
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### Download tarball
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Check our documentation for the [quickstart guide][quickstart]
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and possible [installation methods][installation-methods].
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You can download the latest release tarball directly from [releases][releases].
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## Showdown features
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### Bower
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### Platform-agnostic
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bower install showdown
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Showdown can easily be used on server-side and client-side.
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### npm (server-side)
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### Two-way conversion
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npm install showdown
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Showdown not only helps you to convert your Markdown documents into HTML but also can bring them back to Markdown from HTML.
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### NuGet package
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### Extensions
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PM> Install-Package showdownjs
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Expand Showdown's functionality using a powerful [extension system][extensions]. Extensions can also be used on server-side and client-side.
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The NuGet Packages can be found [here](https://www.nuget.org/packages/showdownjs/).
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### CLI
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### CDN
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Showdown comes bundled with a Command-line interface (CLI) tool that allows you to run Showdown converter from the command line.
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You can also use one of several CDNs available:
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Check the [CLI][cli] section in the documentation for more information.
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* jsDelivr
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## Contribution guide
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https://cdn.jsdelivr.net/npm/showdown@<version tag>/dist/showdown.min.js
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* cdnjs
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https://cdnjs.cloudflare.com/ajax/libs/showdown/<version tag>/showdown.min.js
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* unpkg
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https://unpkg.com/showdown/dist/showdown.min.js
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*Note*: replace `<version tag>` with an actual full length version you're interested in e.g. `1.9.0`
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## Browser Compatibility
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Showdown has been tested successfully with:
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* Firefox 1.5 and 2.0
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* Chrome 12.0
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* Internet Explorer 6 and 7
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* Safari 2.0.4
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* Opera 8.54 and 9.10
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* Netscape 8.1.2
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* Konqueror 3.5.4
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In theory, Showdown will work in any browser that supports ECMA 262 3rd Edition (JavaScript 1.5).
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The converter itself might even work in things that aren't web browsers, like Acrobat. No promises.
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## Node compatibility
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Showdown is intended to work on any supported Node.js version (see the [Node.js releases schedule](https://nodejs.org/en/about/releases/). The code may work with previous versions of Node.js, but no accomidations are made to ensure it does.
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## Legacy version
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If you're looking for showdown v<1.0.0, you can find it in the [**legacy branch**][legacy-branch].
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## Changelog
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You can check the full [changelog][changelog]
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## Extended documentation
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Check our [wiki pages][wiki] for examples and a more in-depth documentation.
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## Quick Example
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### Node
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```js
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var showdown = require('showdown'),
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converter = new showdown.Converter(),
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text = '# hello, markdown!',
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html = converter.makeHtml(text);
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```
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### Browser
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```js
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var converter = new showdown.Converter(),
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text = '# hello, markdown!',
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html = converter.makeHtml(text);
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```
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### Output
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Both examples should output...
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```html
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<h1 id="hellomarkdown">hello, markdown!</h1>
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```
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## Options
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You can change some of showdown's default behavior through options.
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### Setting options
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Options can be set:
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#### Globally
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Setting a "global" option affects all instances of showdown
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```js
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showdown.setOption('optionKey', 'value');
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```
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#### Locally
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Setting a "local" option only affects the specified Converter object.
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Local options can be set:
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* **through the constructor**
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```js
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var converter = new showdown.Converter({optionKey: 'value'});
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```
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* **through the setOption() method**
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```js
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var converter = new showdown.Converter();
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converter.setOption('optionKey', 'value');
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```
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### Getting an option
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Showdown provides 2 methods (both local and global) to retrieve previous set options.
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#### getOption()
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```js
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// Global
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var myOption = showdown.getOption('optionKey');
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//Local
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var myOption = converter.getOption('optionKey');
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```
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#### getOptions()
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```js
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// Global
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var showdownGlobalOptions = showdown.getOptions();
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//Local
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var thisConverterSpecificOptions = converter.getOptions();
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```
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### Retrieve the default options
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You can get showdown's default options with:
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```js
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var defaultOptions = showdown.getDefaultOptions();
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```
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### Valid Options
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* **omitExtraWLInCodeBlocks**: (boolean) [default false] Omit the trailing newline in a code block. Ex:
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This:
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```html
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<code><pre>var foo = 'bar';
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</pre></code>
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```
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Becomes this:
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```html
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<code><pre>var foo = 'bar';</pre></code>
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```
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* **noHeaderId**: (boolean) [default false] Disable the automatic generation of header ids.
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Setting to true overrides **prefixHeaderId**
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* **customizedHeaderId**: (boolean) [default false] Use text in curly braces as header id. **(since v1.7.0)**
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Example:
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```
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## Sample header {real-id} will use real-id as id
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```
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* **ghCompatibleHeaderId**: (boolean) [default false] Generate header ids compatible with github style
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(spaces are replaced with dashes and a bunch of non alphanumeric chars are removed) **(since v1.5.5)**
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* **prefixHeaderId**: (string/boolean) [default false] Add a prefix to the generated header ids.
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Passing a string will prefix that string to the header id. Setting to `true` will add a generic 'section' prefix.
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* **rawPrefixHeaderId**: (boolean) [default false] Setting this option to true will prevent showdown from modifying the prefix.
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This might result in malformed IDs (if, for instance, the " char is used in the prefix).
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Has no effect if prefixHeaderId is set to false. **(since v 1.7.3)**
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* **rawHeaderId**: (boolean) [default false] Remove only spaces, ' and " from generated header ids (including prefixes),
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replacing them with dashes (-). WARNING: This might result in malformed ids **(since v1.7.3)**
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* **headerLevelStart**: (integer) [default 1] Set the header starting level. For instance, setting this to 3 means that
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```md
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# foo
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```
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will be parsed as
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```html
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<h3>foo</h3>
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```
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* **parseImgDimensions**: (boolean) [default false] Enable support for setting image dimensions from within markdown syntax.
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Examples:
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```
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 simple, assumes units are in px
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 sets the height to "auto"
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 Image with width of 80% and height of 5em
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```
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* **simplifiedAutoLink**: (boolean) [default false] Turning this option on will enable automatic linking to urls.
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This means that:
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```md
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some text www.google.com
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```
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will be parsed as
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```html
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<p>some text <a href="www.google.com">www.google.com</a>
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```
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* ~~**excludeTrailingPunctuationFromURLs**: (boolean) [default false] This option excludes trailing punctuation from autolinking urls.
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Punctuation excluded: `. ! ? ( )`. Only applies if **simplifiedAutoLink** option is set to `true`.~~
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* **literalMidWordUnderscores**: (boolean) [default false] Turning this on will stop showdown from interpreting
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underscores in the middle of words as `<em>` and `<strong>` and instead treat them as literal underscores.
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Example:
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```md
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some text with__underscores__in middle
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```
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will be parsed as
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```html
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<p>some text with__underscores__in middle</p>
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```
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* ~~**literalMidWordAsterisks**: (boolean) [default false] Turning this on will stop showdown from interpreting asterisks
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in the middle of words as `<em>` and `<strong>` and instead treat them as literal asterisks.~~
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* **strikethrough**: (boolean) [default false] Enable support for strikethrough syntax.
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`~~strikethrough~~` as `<del>strikethrough</del>`
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* **tables**: (boolean) [default false] Enable support for tables syntax. Example:
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```md
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| h1 | h2 | h3 |
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|:------|:-------:|--------:|
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| 100 | [a][1] | ![b][2] |
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| *foo* | **bar** | ~~baz~~ |
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```
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See the wiki for more info
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* **tablesHeaderId**: (boolean) [default false] If enabled adds an id property to table headers tags.
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* **ghCodeBlocks**: (boolean) [default true] Enable support for GFM code block style.
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* **tasklists**: (boolean) [default false] Enable support for GFM tasklists. Example:
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```md
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- [x] This task is done
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- [ ] This is still pending
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```
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* **smoothLivePreview**: (boolean) [default false] Prevents weird effects in live previews due to incomplete input
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* **smartIndentationFix**: (boolean) [default false] Tries to smartly fix indentation problems related to es6 template
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strings in the midst of indented code.
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* **disableForced4SpacesIndentedSublists**: (boolean) [default false] Disables the requirement of indenting sublists
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by 4 spaces for them to be nested, effectively reverting to the old behavior where 2 or 3 spaces were enough.
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**(since v1.5.0)**
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* **simpleLineBreaks**: (boolean) [default false] Parses line breaks as `<br>`, without
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needing 2 spaces at the end of the line **(since v1.5.1)**
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```md
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a line
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wrapped in two
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```
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turns into:
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```html
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<p>a line<br>
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wrapped in two</p>
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```
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* **requireSpaceBeforeHeadingText**: (boolean) [default false] Makes adding a space between `#` and the header text mandatory **(since v1.5.3)**
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* **ghMentions**: (boolean) [default false] Enables github @mentions, which link to the username mentioned **(since v1.6.0)**
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* **ghMentionsLink**: (string) [default `https://github.com/{u}`] Changes the link generated by @mentions.
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Showdown will replace `{u}` with the username. Only applies if ghMentions option is enabled.
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Example: `@tivie` with ghMentionsOption set to `//mysite.com/{u}/profile` will result in `<a href="//mysite.com/tivie/profile">@tivie</a>`
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* **encodeEmails**: (boolean) [default true] Enable e-mail addresses encoding through the use of Character Entities, transforming ASCII e-mail addresses into its equivalent decimal entities. (since v1.6.1)
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NOTE: Prior to version 1.6.1, emails would always be obfuscated through dec and hex encoding.
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* **openLinksInNewWindow**: (boolean) [default false] Open all links in new windows
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(by adding the attribute `target="_blank"` to `<a>` tags) **(since v1.7.0)**
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* **backslashEscapesHTMLTags**: (boolean) [default false] Support for HTML Tag escaping. ex: `\<div>foo\</div>` **(since v1.7.2)**
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* **emoji**: (boolean) [default false] Enable emoji support. Ex: `this is a :smile: emoji`
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For more info on available emojis, see https://github.com/showdownjs/showdown/wiki/Emojis **(since v.1.8.0)**
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* **underline**: (boolean) [default false] ***EXPERIMENTAL FEATURE*** Enable support for underline.
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Syntax is **double** or **triple** **underscores** ex: `__underlined word__`. With this option enabled, underscores are no longer parses into `<em>` and `<strong>`.
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* **ellipsis**: (boolean) [default true] Replaces three dots with the ellipsis unicode character.
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* **completeHTMLDocument**: (boolean) [default false] Outputs a complete html document,
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including `<html>`, `<head>` and `<body>` tags' instead of an HTML fragment. (since v.1.8.5)
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* **metadata**: (boolean) [default false] Enable support for document metadata (defined at the top of the document
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between `«««` and `»»»` or between `---` and `---`). (since v.1.8.5)
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```js
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var conv = new showdown.Converter({metadata: true});
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var html = conv.makeHtml(someMd);
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var metadata = conv.getMetadata(); // returns an object with the document metadata
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```
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* **splitAdjacentBlockquotes**: (boolean) [default false] Split adjacent blockquote blocks.(since v.1.8.6)
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* **moreStyling**: (boolean) [default false] Adds some useful classes for css styling. (since v2.0.1)
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- Tasklists: Adds the class `task-list-item-complete` to completed tasks items in GFM tasklists.
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**NOTE**: Please note that until **version 1.6.0**, all of these options are ***DISABLED*** by default in the cli tool.
|
||||
|
||||
|
||||
## Flavors
|
||||
|
||||
You can also use flavors or presets to set the correct options automatically, so that showdown behaves like popular markdown flavors.
|
||||
|
||||
Currently, the following flavors are available:
|
||||
|
||||
* original - original markdown flavor as in [John Gruber's spec](https://daringfireball.net/projects/markdown/)
|
||||
* vanilla - showdown base flavor (as from v1.3.1)
|
||||
* github - GFM (GitHub Flavored Markdown)
|
||||
|
||||
|
||||
### Global
|
||||
```javascript
|
||||
showdown.setFlavor('github');
|
||||
```
|
||||
|
||||
### Instance
|
||||
```javascript
|
||||
converter.setFlavor('github');
|
||||
```
|
||||
|
||||
|
||||
## CLI Tool
|
||||
|
||||
Showdown also comes bundled with a Command Line Interface tool. You can check the [CLI wiki page][cli-wiki] for more info
|
||||
|
||||
## Integration with AngularJS
|
||||
|
||||
ShowdownJS project also provides seamlessly integration with AngularJS via a "plugin".
|
||||
Please visit https://github.com/showdownjs/ngShowdown for more information.
|
||||
|
||||
## Integration with TypeScript
|
||||
|
||||
If you're using TypeScript you maybe want to use the types from [DefinitelyTyped][definitely-typed]
|
||||
|
||||
## Integration with SystemJS/JSPM
|
||||
|
||||
Integration with SystemJS can be obtained via the third party ["system-md" plugin](https://github.com/guybedford/system-md).
|
||||
|
||||
## Integration with VueJS
|
||||
|
||||
To use ShowdownJS as a Vue component quickly, you can check [vue-showdown](https://vue-showdown.js.org/).
|
||||
|
||||
## XSS vulnerability
|
||||
|
||||
Showdown doesn't sanitize the input. This is by design since markdown relies on it to allow certain features to be correctly parsed into HTML.
|
||||
This, however, means XSS injection is quite possible.
|
||||
|
||||
Please refer to the wiki article [Markdown's XSS Vulnerability (and how to mitigate it)][xss-wiki]
|
||||
for more information.
|
||||
|
||||
## Extensions
|
||||
|
||||
Showdown allows additional functionality to be loaded via extensions. (you can find a list of known showdown extensions [here][ext-wiki])
|
||||
You can also find a boilerplate, to create your own extensions in [this repository][boilerplate-repo]
|
||||
|
||||
### Client-side Extension Usage
|
||||
|
||||
```js
|
||||
<script src="showdown.js" />
|
||||
<script src="twitter-extension.js" />
|
||||
|
||||
var converter = new showdown.Converter({ extensions: ['twitter'] });
|
||||
```
|
||||
|
||||
### Server-side Extension Usage
|
||||
|
||||
```js
|
||||
var showdown = require('showdown'),
|
||||
myExtension = require('myExtension'),
|
||||
converter = new showdown.Converter({ extensions: ['myExtension'] });
|
||||
```
|
||||
|
||||
## Building
|
||||
|
||||
Building your clone of the repository is easy.
|
||||
> Prerequesites: [Node.js](https://nodejs.org/) v12, [npm](https://www.npmjs.com/package/npm) and [npx](https://www.npmjs.com/package/npx) must be installed.
|
||||
|
||||
1. run `npm install`.
|
||||
2. run `npx grunt build` (see [`Gruntfile.js`](/Gruntfile.js)). This command:
|
||||
|
||||
1. Cleans the repo.
|
||||
2. Checks code quality ([JSHint](https://jshint.com/) and [ESLint](https://eslint.org/)).
|
||||
3. Runs tests.
|
||||
4. Creates the [distributable](/showdown.js) and [minified](/showdown.min.js) files in the [`dist`](/dist) folder.
|
||||
|
||||
## Tests
|
||||
|
||||
A suite of tests is available which require Node.js. Once Node is installed, run the following command from
|
||||
the project root to install the dependencies:
|
||||
|
||||
npm install
|
||||
|
||||
Once installed the tests can be run from the project root using:
|
||||
|
||||
npm test
|
||||
|
||||
New test cases can easily be added. Create a markdown file (ending in `.md`) which contains the markdown to test.
|
||||
Create a `.html` file of the exact same name. It will automatically be tested when the tests are executed with `mocha`.
|
||||
|
||||
## Contributing
|
||||
|
||||
If you wish to contribute please read the following quick guide.
|
||||
|
||||
### Want a Feature?
|
||||
You can request a new feature by submitting an issue. If you would like to implement a new feature feel free to issue a
|
||||
Pull Request.
|
||||
|
||||
|
||||
### Pull requests (PRs)
|
||||
PRs are awesome. However, before you submit your pull request consider the following guidelines:
|
||||
|
||||
- Search GitHub for an open or closed Pull Request that relates to your submission. You don't want to duplicate effort.
|
||||
- When issuing PRs that change code, make your changes in a new git branch based on master:
|
||||
|
||||
```bash
|
||||
git checkout -b my-fix-branch master
|
||||
```
|
||||
|
||||
- Documentation (i.e: README.md) changes can be made directly against master.
|
||||
- Run the full test suite before submitting and make sure all tests pass (obviously =P).
|
||||
- Try to follow our [**coding style rules**][coding-rules].
|
||||
Breaking them prevents the PR to pass the tests.
|
||||
- Refrain from fixing multiple issues in the same pull request. It's preferable to open multiple small PRs instead of one
|
||||
hard to review big one.
|
||||
- If the PR introduces a new feature or fixes an issue, please add the appropriate test case.
|
||||
- We use commit notes to generate the changelog. It's extremely helpful if your commit messages adhere to the
|
||||
[**AngularJS Git Commit Guidelines**][ng-commit-guide].
|
||||
- If we suggest changes then:
|
||||
- Make the required updates.
|
||||
- Re-run the Angular test suite to ensure tests are still passing.
|
||||
- Rebase your branch and force push to your GitHub repository (this will update your Pull Request):
|
||||
|
||||
```bash
|
||||
git rebase master -i
|
||||
git push origin my-fix-branch -f
|
||||
```
|
||||
- After your pull request is merged, you can safely delete your branch.
|
||||
|
||||
If you have time to contribute to this project, we feel obliged that you get credit for it.
|
||||
These rules enable us to review your PR faster and will give you appropriate credit in your GitHub profile.
|
||||
We thank you in advance for your contribution!
|
||||
|
||||
### Joining the team
|
||||
We're looking for members to help maintaining Showdown.
|
||||
Please see [this issue](https://github.com/showdownjs/showdown/issues/114) to express interest or comment on this note.
|
||||
If you want to contribute to the project, that's awesome! Please check our [guide][contribution-guide].
|
||||
|
||||
## Credits
|
||||
Full credit list at https://github.com/showdownjs/showdown/blob/master/CREDITS.md
|
||||
|
||||
Showdown is powered by:<br/>
|
||||
[](https://www.jetbrains.com/webstorm/)
|
||||
Full credit list across the versions is available [here][credits].
|
||||
|
||||
## License
|
||||
|
||||
ShowdownJS v 2.0 is release under the MIT version.
|
||||
|
||||
Previous versions are release under BSD.
|
||||
|
||||
----
|
||||
|
||||
[sd-logo]: https://raw.githubusercontent.com/showdownjs/logo/master/dist/logo.readme.png
|
||||
[legacy-branch]: https://github.com/showdownjs/showdown/tree/legacy
|
||||
[releases]: https://github.com/showdownjs/showdown/releases
|
||||
[changelog]: https://github.com/showdownjs/showdown/blob/master/CHANGELOG.md
|
||||
[wiki]: https://github.com/showdownjs/showdown/wiki
|
||||
[cli-wiki]: https://github.com/showdownjs/showdown/wiki/CLI-tool
|
||||
[definitely-typed]: https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/showdown
|
||||
[xss-wiki]: https://github.com/showdownjs/showdown/wiki/Markdown's-XSS-Vulnerability-(and-how-to-mitigate-it)
|
||||
[ext-wiki]: https://github.com/showdownjs/showdown/wiki/extensions
|
||||
[coding-rules]: https://github.com/showdownjs/code-style/blob/master/README.md
|
||||
[ng-commit-guide]: https://github.com/showdownjs/code-style/blob/master/README.md#commit-message-convention
|
||||
[boilerplate-repo]: https://github.com/showdownjs/extension-boilerplate
|
||||
[quickstart]: https://showdownjs.com/docs/quickstart/
|
||||
[installation-methods]: https://showdownjs.com/docs/quickstart/#other-installation-methods
|
||||
[extensions]: https://showdownjs.com/docs/extensions/
|
||||
[cli]: https://showdownjs.com/docs/cli/
|
||||
[contribution-guide]: https://showdownjs.com/docs/contribution-guide/
|
||||
[credits]: https://showdownjs.com/docs/credits/
|
||||
Loading…
Reference in New Issue