Handlebars helper new line to br

Handlebars.helpers-nl2br.js

/**
 * Replace \n by <br />, such as the `nl2br` in PHP
 * @see http://stackoverflow.com/questions/2919337/jquery-convert-line-breaks-to-br-nl2br-equivalent
 */
Handlebars.registerHelper('nl2br', function (text, isXhtml) {
  var breakTag = (isXhtml || typeof isXhtml === 'undefined') ? '<br />' : '<br>';
  return (text + '').replace(/([^>\r\n]?)(\r\n|\n\r|\r|\n)/g, '$1' + breakTag + '$2');
});

this version reuses the internals from Handlebars in accordance with the docs:

Handlebars.registerHelper('nl2br', function(text, isXhtml) {
  const breakTag = isXhtml ? '<br />' : '<br>'
  const withBr = Handlebars.escapeExpression(text).replace(
    /([^>\r\n]?)(\r\n|\n\r|\r|\n)/g,
    '$1' + breakTag + '$2'
  )
  return new Handlebars.SafeString(withBr)
})