440 lines
12 KiB
Markdown
440 lines
12 KiB
Markdown
<h1 align="center"> ✨ Markdown Preview for (Neo)vim ✨ </h1>
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> Powered by ❤️
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### Introduction
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> It only works on vim >= 8.1 and neovim
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Preview markdown on your modern browser with synchronised scrolling and flexible configuration
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Main features:
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- Cross platform (macos/linux/windows)
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- Synchronised scrolling
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- Fast asynchronous updates
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- [Katex](https://github.com/Khan/KaTeX) for typesetting of math
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- [Plantuml](https://github.com/plantuml/plantuml)
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- [Mermaid](https://github.com/knsv/mermaid)
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- [Chart.js](https://github.com/chartjs/Chart.js)
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- [sequence-diagrams](https://github.com/bramp/js-sequence-diagrams)
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- [flowchart](https://github.com/adrai/flowchart.js)
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- [dot](https://github.com/mdaines/viz.js)
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- [Toc](https://github.com/nagaozen/markdown-it-toc-done-right)
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- Emoji
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- Task lists
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- Local images
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- Flexible configuration
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**Note** it's no need `mathjax-support-for-mkdp` plugin for typesetting of math
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### install & usage
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Install with [vim-plug](https://github.com/junegunn/vim-plug):
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```vim
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" If you don't have nodejs and yarn
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" use pre build, add 'vim-plug' to the filetype list so vim-plug can update this plugin
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" see: https://github.com/iamcco/markdown-preview.nvim/issues/50
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Plug 'iamcco/markdown-preview.nvim', { 'do': { -> mkdp#util#install() }, 'for': ['markdown', 'vim-plug']}
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" If you have nodejs and yarn
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Plug 'iamcco/markdown-preview.nvim', { 'do': 'cd app && yarn install' }
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```
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Or install with [dein](https://github.com/Shougo/dein.vim):
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```vim
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call dein#add('iamcco/markdown-preview.nvim', {'on_ft': ['markdown', 'pandoc.markdown', 'rmd'],
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\ 'build': 'sh -c "cd app && yarn install"' })
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```
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Or with minpac:
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```vim
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call minpac#add('iamcco/markdown-preview.nvim', {'do': 'packloadall! | call mkdp#util#install()'})
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```
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Or with [Vundle](https://github.com/vundlevim/vundle.vim):
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Place this in your `.vimrc` or `init.vim`,
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```vim
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Plugin 'iamcco/markdown-preview.nvim'
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```
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... then run the following in vim (to complete the `Plugin` installation):
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```vim
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:source %
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:PluginInstall
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:call mkdp#util#install()
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```
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Or with [Packer.nvim](https://github.com/wbthomason/packer.nvim):
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Add this in your `init.lua or plugins.lua`
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```lua
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-- install without yarn or npm
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use({
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"iamcco/markdown-preview.nvim",
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run = function() vim.fn["mkdp#util#install"]() end,
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})
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use({ "iamcco/markdown-preview.nvim", run = "cd app && npm install", setup = function() vim.g.mkdp_filetypes = { "markdown" } end, ft = { "markdown" }, })
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```
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Or by hand
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```vim
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use {'iamcco/markdown-preview.nvim'}
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```
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add plugin in `~/.local/share/nvim/site/pack/packer/start/` directory:
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```vim
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cd ~/.local/share/nvim/site/pack/packer/start/
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git clone https://github.com/iamcco/markdown-preview.nvim.git
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cd markdown-preview.nvim
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yarn install
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yarn build
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```
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Please make sure that you have installed `node.js` and `yarn`.
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Open `nvim` and run `:PackerInstall` to make it workable
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### MarkdownPreview Config:
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```vim
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" set to 1, nvim will open the preview window after entering the markdown buffer
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" default: 0
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let g:mkdp_auto_start = 0
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" set to 1, the nvim will auto close current preview window when change
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" from markdown buffer to another buffer
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" default: 1
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let g:mkdp_auto_close = 1
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" set to 1, the vim will refresh markdown when save the buffer or
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" leave from insert mode, default 0 is auto refresh markdown as you edit or
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" move the cursor
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" default: 0
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let g:mkdp_refresh_slow = 0
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" set to 1, the MarkdownPreview command can be use for all files,
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" by default it can be use in markdown file
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" default: 0
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let g:mkdp_command_for_global = 0
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" set to 1, preview server available to others in your network
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" by default, the server listens on localhost (127.0.0.1)
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" default: 0
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let g:mkdp_open_to_the_world = 0
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" use custom IP to open preview page
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" useful when you work in remote vim and preview on local browser
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" more detail see: https://github.com/iamcco/markdown-preview.nvim/pull/9
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" default empty
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let g:mkdp_open_ip = ''
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" specify browser to open preview page
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" for path with space
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" valid: `/path/with\ space/xxx`
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" invalid: `/path/with\\ space/xxx`
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" default: ''
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let g:mkdp_browser = ''
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" set to 1, echo preview page url in command line when open preview page
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" default is 0
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let g:mkdp_echo_preview_url = 0
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" a custom vim function name to open preview page
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" this function will receive url as param
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" default is empty
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let g:mkdp_browserfunc = ''
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" options for markdown render
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" mkit: markdown-it options for render
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" katex: katex options for math
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" uml: markdown-it-plantuml options
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" maid: mermaid options
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" disable_sync_scroll: if disable sync scroll, default 0
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" sync_scroll_type: 'middle', 'top' or 'relative', default value is 'middle'
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" middle: mean the cursor position alway show at the middle of the preview page
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" top: mean the vim top viewport alway show at the top of the preview page
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" relative: mean the cursor position alway show at the relative positon of the preview page
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" hide_yaml_meta: if hide yaml metadata, default is 1
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" sequence_diagrams: js-sequence-diagrams options
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" content_editable: if enable content editable for preview page, default: v:false
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" disable_filename: if disable filename header for preview page, default: 0
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let g:mkdp_preview_options = {
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\ 'mkit': {},
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\ 'katex': {},
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\ 'uml': {},
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\ 'maid': {},
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\ 'disable_sync_scroll': 0,
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\ 'sync_scroll_type': 'middle',
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\ 'hide_yaml_meta': 1,
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\ 'sequence_diagrams': {},
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\ 'flowchart_diagrams': {},
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\ 'content_editable': v:false,
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\ 'disable_filename': 0,
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\ 'toc': {}
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\ }
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" use a custom markdown style must be absolute path
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" like '/Users/username/markdown.css' or expand('~/markdown.css')
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let g:mkdp_markdown_css = ''
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" use a custom highlight style must absolute path
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" like '/Users/username/highlight.css' or expand('~/highlight.css')
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let g:mkdp_highlight_css = ''
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" use a custom port to start server or empty for random
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let g:mkdp_port = ''
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" preview page title
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" ${name} will be replace with the file name
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let g:mkdp_page_title = '「${name}」'
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" recognized filetypes
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" these filetypes will have MarkdownPreview... commands
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let g:mkdp_filetypes = ['markdown']
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" set default theme (dark or light)
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" By default the theme is define according to the preferences of the system
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let g:mkdp_theme = 'dark'
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```
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Mappings:
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```vim
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" normal/insert
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<Plug>MarkdownPreview
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<Plug>MarkdownPreviewStop
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<Plug>MarkdownPreviewToggle
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" example
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nmap <C-s> <Plug>MarkdownPreview
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nmap <M-s> <Plug>MarkdownPreviewStop
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nmap <C-p> <Plug>MarkdownPreviewToggle
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```
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Commands:
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```vim
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" Start the preview
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:MarkdownPreview
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" Stop the preview"
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:MarkdownPreviewStop
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```
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### Custom Examples
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**Toc:**
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> one of
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${toc}
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[[toc]]
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[toc]
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[[_toc_]]
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**Image Size:**
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``` markdown
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```
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**plantuml:**
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@startuml
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Bob -> Alice : hello
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@enduml
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Or
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``` plantuml
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Bob -> Alice : hello
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```
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**katex:**
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$\sqrt{3x-1}+(1+x)^2$
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$$\begin{array}{c}
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\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} &
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= \frac{4\pi}{c}\vec{\mathbf{j}} \nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\
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\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\
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\nabla \cdot \vec{\mathbf{B}} & = 0
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\end{array}$$
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**mermaid:**
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``` mermaid
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gantt
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dateFormat DD-MM-YYY
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axisFormat %m/%y
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title Example
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section example section
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activity :active, 01-02-2019, 03-08-2019
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```
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**js-sequence-diagrams:**
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``` sequence-diagrams
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Andrew->China: Says
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Note right of China: China thinks\nabout it
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China-->Andrew: How are you?
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Andrew->>China: I am good thanks!
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```
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**flowchart:**
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``` flowchart
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st=>start: Start|past:>http://www.google.com[blank]
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e=>end: End|future:>http://www.google.com
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op1=>operation: My Operation|past
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op2=>operation: Stuff|current
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sub1=>subroutine: My Subroutine|invalid
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cond=>condition: Yes
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or No?|approved:>http://www.google.com
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c2=>condition: Good idea|rejected
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io=>inputoutput: catch something...|future
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st->op1(right)->cond
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cond(yes, right)->c2
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cond(no)->sub1(left)->op1
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c2(yes)->io->e
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c2(no)->op2->e
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```
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**dot:**
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``` dot
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digraph G {
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subgraph cluster_0 {
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style=filled;
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color=lightgrey;
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node [style=filled,color=white];
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a0 -> a1 -> a2 -> a3;
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label = "process #1";
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}
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subgraph cluster_1 {
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node [style=filled];
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b0 -> b1 -> b2 -> b3;
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label = "process #2";
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color=blue
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}
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start -> a0;
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start -> b0;
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a1 -> b3;
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b2 -> a3;
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a3 -> a0;
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a3 -> end;
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b3 -> end;
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start [shape=Mdiamond];
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end [shape=Msquare];
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}
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```
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**chart:**
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``` chart
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{
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"type": "pie",
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"data": {
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"labels": [
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"Red",
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"Blue",
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"Yellow"
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],
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"datasets": [
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{
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"data": [
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300,
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50,
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100
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],
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"backgroundColor": [
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"#FF6384",
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"#36A2EB",
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"#FFCE56"
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],
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"hoverBackgroundColor": [
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"#FF6384",
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"#36A2EB",
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"#FFCE56"
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]
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}
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]
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},
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"options": {}
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}
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```
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### FAQ
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Question: Why is the synchronised scrolling lagging?
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Answer: set `updatetime` to a small number, for instance: `set updatetime=100`
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*WSL 2 issue*: Can not open browser when using WSL 2 with terminal Vim.
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> if you are using Ubuntu you can install xdg-utils using `sudo apt-get install -y xdg-utils`
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> checkout [issue 199](https://github.com/iamcco/markdown-preview.nvim/issues/199) for more detail.
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Question: How can I change the dark/light theme?
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Answer: The default theme is based on your system preferences.
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There is a button hidden in the header to change the theme. Place your mouse over the header to reveal it.
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Question: How can I pass CLI options to the browser, like opening in a new window?
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Answer: Add the following to your NVIM init script:
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```vimscript
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function OpenMarkdownPreview (url)
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execute "silent ! firefox --new-window " . a:url
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endfunction
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let g:mkdp_browserfunc = 'OpenMarkdownPreview'
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```
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Replace "firefox" with "chrome" if you prefer. Both browsers recognize the `--new-window` option.
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### About vim support
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Vim support is powered by [@chemzqm/neovim](https://github.com/neoclide/neovim)
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### Reference
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- [coc.nvim](https://github.com/neoclide/coc.nvim)
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- [@chemzqm/neovim](https://github.com/neoclide/neovim)
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- [chart.js](https://github.com/chartjs/Chart.js)
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- [highlight](https://github.com/highlightjs/highlight.js)
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- [neovim/node-client](https://github.com/neovim/node-client)
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- [next.js](https://github.com/zeit/next.js)
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- [markdown.css](https://github.com/iamcco/markdown.css)
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- [markdown-it](https://github.com/markdown-it/markdown-it)
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- [markdown-it-katex](https://github.com/waylonflinn/markdown-it-katex)
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- [markdown-it-plantuml](https://github.com/gmunguia/markdown-it-plantuml)
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- [markdown-it-chart](https://github.com/tylingsoft/markdown-it-chart)
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- [mermaid](https://github.com/knsv/mermaid)
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- [opener](https://github.com/domenic/opener)
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- [sequence-diagrams](https://github.com/bramp/js-sequence-diagrams)
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- [socket.io](https://github.com/socketio/socket.io)
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### Buy Me A Coffee ☕️
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