RunKit + npm: remark-slug

var fs = require('fs') var unified = require('unified') var markdown = require('remark-parse') var slug = require('remark-slug') var remark2rehype = require('remark-rehype') var html = require('rehype-stringify') var content = `## <a name="foo"></a> Foo\n## <a name="foo"></a> _Foo_`; unified() .use(markdown) .use(slug) .use(remark2rehype) .use(html) .process(content, function(err, file) { if (err) throw err console.log(String(file)) })