// Extracted from https://github.com/ember-fastboot/ember-cli-fastboot/blob/909c1417ceeb8a5c92bb952b0d59be02bfdca546/packages/fastboot/src/ember-app.js#L406-L420
// Discussion in https://github.com/ember-fastboot/fastboot/pull/85

const JSON_ESCAPE = {
  '&': '\\u0026',
  '>': '\\u003e',
  '<': '\\u003c',
  '\u2028': '\\u2028',
  '\u2029': '\\u2029'
};

const JSON_ESCAPE_REGEXP = /[\u2028\u2029&><]/g;

function escapeJSONString(string) {
  return string.replace(JSON_ESCAPE_REGEXP, function(match) {
    return JSON_ESCAPE[match];
  });
}