Checks for specified Ensighten data definition, ensuring only an expected value is returned. The primary benefit is that "data does not exist" messages are not captured in your data.

ens_getDataDef.js

/**
 * checks for specified data definition, ensuring only an expected value is returned.
 * the primary benefit is that "data does not exist" messages are not captured in your data
 * @param dataDefId {number} data definition id
 */
function getDataDef(dataDefId) {
  // check the list of data definition ids on the current page before attempting to resolve
  if (Bootstrapper.dataDefinitionIds.indexOf(dataDefId) > -1) {
    return Bootstrapper.data.resolve(dataDefId);
  } else {
    // try the request anyway to let the "failure" get logged in an e.gif request
    var dataDefValue = Bootstrapper.data.resolve(dataDefId);
    return !/data\sdefinition.*does\snot\sexist/i.test(dataDefValue) ? dataDefValue : "";
  }
}

console.log(getDataDef(12345));