node_modules/remark-stringify/lib/util/label.js

'use strict'

module.exports = label

var leftSquareBracket = '['
var rightSquareBracket = ']'

var shortcut = 'shortcut'
var collapsed = 'collapsed'

// Stringify a reference label.
// Because link references are easily, mistakingly, created (for example,
// `[foo]`), reference nodes have an extra property depicting how it looked in
// the original document, so stringification can cause minimal changes.
function label(node) {
  var type = node.referenceType

  if (type === shortcut) {
    return ''
  }

  return (
    leftSquareBracket +
    (type === collapsed ? '' : node.label || node.identifier) +
    rightSquareBracket
  )
}