Function addAsyncPropsToPropPrototype

docs/tests/v2/es6/js/sanddance.js:42982–43009

(defaultProps, propTypes)

function addAsyncPropsToPropPrototype(defaultProps, propTypes) {
  var defaultValues = {};
  var descriptors = {
    // Default "resolved" values for async props, returned if value not yet resolved/set.
    _asyncPropDefaultValues: {
      enumerable: false,
      value: defaultValues
    },
    // Shadowed object, just to make sure "early indexing" into the instance does not fail
    _asyncPropOriginalValues: {
      enumerable: false,
      value: {}
    }
  }; // Move async props into shadow values

  for (var propName in propTypes) {
    var propType = propTypes[propName];
    var name = propType.name,
        value = propType.value; // Note: async is ES7 keyword, can't destructure

    if (propType.async) {
      defaultValues[name] = value;
      descriptors[name] = getDescriptorForAsyncProp(name, value);
    }
  }

  Object.defineProperties(defaultProps, descriptors);
} // Helper: Configures getter and setter for one async prop


function getDescriptorForAsyncProp(name) {