Function getDescriptorForAsyncProp

docs/tests/v2/es6/js/sanddance.js:43012–43053

(name)

function getDescriptorForAsyncProp(name) {
  return {
    configurable: false,
    enumerable: true,
    // Save the provided value for async props in a special map
    set: function set(newValue) {
      if (typeof newValue === 'string' || newValue instanceof Promise) {
        this._asyncPropOriginalValues[name] = newValue;
      } else {
        this._asyncPropResolvedValues[name] = newValue;
      }
    },
    // Only the component's state knows the true value of async prop
    get: function get() {
      if (this._asyncPropResolvedValues) {
        // Prop value isn't async, so just return it
        if (name in this._asyncPropResolvedValues) {
          var value = this._asyncPropResolvedValues[name]; // Special handling - components expect null `data` prop expects to be replaced with `[]`

          if (name === 'data') {
            return value || this._asyncPropDefaultValues[name];
          }

          return value;
        }

        if (name in this._asyncPropOriginalValues) {
          // It's an async prop value: look into component state
          var state = this._component && this._component.internalState;

          if (state && state.hasAsyncProp(name)) {
            return state.getAsyncProp(name);
          }
        }
      } // the prop is not supplied, or
      // component not yet initialized/matched, return the component's default value for the prop


      return this._asyncPropDefaultValues[name];
    }
  };
} // HELPER METHODS


function hasOwnProperty(object, prop) {