Helpers

The options-parameter

In addition to the parameters used in the helper-call, an options-object is passed to the helper as additional parameter.

• lookupProperty(object, propertyName): a function that returns an "own property" of an object. Whitelists specified in allowedProtoProperties and allowedProtoMethods are respected by this function. Example:

  preparationScript

  Handlebars.registerHelper('lookupOrDefault', function (object, propertyName, defaultValue, options) {
      var result = options.lookupProperty(object, propertyName)
      if (result != null) {
          return result
      }
      return defaultValue
  })
  

• TODO: Describe all options that are passed to helpers