Vue Render Merge

vue-render-merge.js

Vue.config.optionMergeStrategies.render = (parentVal, childVal) => {
  if (parentVal) {
    const mergedParentVal = function render(...args) {
      args.push([childVal.apply(this, args)]);
      return parentVal.apply(this, args);
    };

    return mergedParentVal;
  }

  return childVal;
};