@goa/goa/modules/escape-html/index.js

The Goa Source Code For Compilation Into @Goa/Koa That Includes Modules, Tests, Types And Dependencies.

/*!
 * escape-html
 * Copyright(c) 2012-2013 TJ Holowaychuk
 * Copyright(c) 2015 Andreas Lubbe
 * Copyright(c) 2015 Tiancheng "Timothy" Gu
 * MIT Licensed
 */


var matchHtmlRegExp = /["'&<>]/

/**
 * Escape special characters in the given string of html.
 *
 * @param  {string} string The string to escape for inserting into HTML
 */
export default function escapeHtml(string) {
  var str = '' + string
  var match = matchHtmlRegExp.exec(str)

  if (!match) {
    return str
  }

  var escape
  var html = ''
  var index = 0
  var lastIndex = 0

  for (index = match.index; index < str.length; index++) {
    switch (str.charCodeAt(index)) {
    case 34: // "
      escape = '&quot;'
      break
    case 38: // &
      escape = '&amp;'
      break
    case 39: // '
      escape = '&#39;'
      break
    case 60: // <
      escape = '&lt;'
      break
    case 62: // >
      escape = '&gt;'
      break
    default:
      continue
    }

    if (lastIndex !== index) {
      html += str.substring(lastIndex, index)
    }

    lastIndex = index + 1
    html += escape
  }

  return lastIndex !== index
    ? html + str.substring(lastIndex, index)
    : html
}