markdown it vs. pandoc

1. Configuration similarly to pandoc's configuration
2. Support three main markdown flavors:
   1. commonmark
   2. markdown_github
   3. markdown_pandoc
3. Smart punctuation should be configurable.
4. Support the following extensions:
   • checkboxes: https://www.npmjs.com/package/markdown-it-checkbox
   • emoji: https://www.npmjs.com/package/markdown-it-emoji
   • Optional:
     • https://www.npmjs.com/package/markdown-it-toc
     • https://www.npmjs.com/package/markdown-it-smartarrows
     • https://www.npmjs.com/package/markdown-it-abbr

Topic | Pandoc Feature | importance | markdown-it support ----- |----- | ------ | ------ | ------ | Headers | blank_before_header | low | yes Headers | header_attributes | low | plugin? Headers | auto_identifiers | low | plugin? Headers | implicit_header_references | low | ??? Blockquote | blank_before_blockquote | low | no support Code | fenced_code_blocks | high | built in Code | backtick_code_blocks | high | built in Code | fenced_code_attributes | medium | built in^1, plugin? Code | inline_code_attributes | medium | no support Line blocks | line_blocks | medium | ??? Lists | fancy_lists | medium | ??? Lists | startnum | medium | built in Lists | definition_lists | medium | plugin Lists | example_lists | medium | ??? Tables | table_cpations | medium | ??? Tables | simple_tables | medium | ??? Tables | multiline_tables | medium | ??? Tables | grid_tables | medium | ??? Tables | pipe_tables | high | built in Metadata | pandoc_title_block | low | ??? Metadata | yaml_metadata_block | low | ??? Escapes | all_symbols_escapable | medium | built in Emphasis | intraword_underscores | high | built in Emphasis | strikeout | high | built in Emphasis | superscript, subscript | high | Plugins: npm_sup, npm_sub Math | tex_math_dollars | high | plugin Math | latex_macros | medium | ??? Raw HTML | raw_html | high | built in Raw HTML | markdown_in_html_blocks | high | built in^2 Links | shortcut_reference_links | medium | built in Footnotes | footnotes | high | plugin Footnotes | inline_notes | high | plugin Citations | citations | medium | ???

^1: markdown-it does not support complex fenced code attributes like {#mycode .haskell .numberLines startFrom="100"}, only simple haskell

^2: There needs to be a new line between html and markdown content, for more information see text below http://spec.commonmark.org/0.21/#example-139