Function mergeOptions

docs/themes/htx/source/js/vue.js:1414–1450

* Merge two option objects into a new one. * Core utility used in both instantiation and inheritance.

(parent, child, vm)

   * Core utility used in both instantiation and inheritance.
   */
  function mergeOptions(parent, child, vm) {
    {
      checkComponents(child);
    }

    if (typeof child === "function") {
      child = child.options;
    }

    normalizeProps(child, vm);
    normalizeInject(child, vm);
    normalizeDirectives(child);
    var extendsFrom = child.extends;
    if (extendsFrom) {
      parent = mergeOptions(parent, extendsFrom, vm);
    }
    if (child.mixins) {
      for (var i = 0, l = child.mixins.length; i < l; i++) {
        parent = mergeOptions(parent, child.mixins[i], vm);
      }
    }
    var options = {};
    var key;
    for (key in parent) {
      mergeField(key);
    }
    for (key in child) {
      if (!hasOwn(parent, key)) {
        mergeField(key);
      }
    }
    function mergeField(key) {
      var strat = strats[key] || defaultStrat;
      options[key] = strat(parent[key], child[key], vm, key);
    }
    return options;
  }

  /**
   * Resolve an asset.