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March 5, 2018 22:37
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Strikethrough extension for mrk (https://github.com/heyitsmeuralex/mrk)
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const markStrikethrough = mrk({ | |
extendPatterns: { | |
strikethroughStart: ({ read, has }) => { | |
// If this function returns a truthy value, it will be parsed as a strikethroughStart token | |
// See mrk.js for how `read` and `has` work, plus other functions you get access to. | |
return read(2) === '~~' // Next 2 characters should be `~~` | |
&& !has('strikethroughStart', 'strikethroughEnd') // Not already strikethrough! | |
}, | |
strikethroughEnd: ({ read, has }) => { | |
return read(2) === '~~' // Next 2 characters should be `~~` | |
&& has('strikethroughStart', 'strikethroughEnd') // Must have a strikethroughStart before this token | |
}, | |
}, | |
extendPairs: { | |
// If there is a strikethroughStart token on its own without a strikethroughEnd token to be paired | |
// to, it will be discarded and parsed as text. | |
strikethroughStart: 'strikethroughEnd' | |
}, | |
extendHtmlify: { | |
// Declares how to convert these tokens into HTML strings. | |
strikethroughStart = () => '<s>', | |
strikethroughEnd = () => '</s>' | |
} | |
}) |
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