Vue provides a straight-forward syntax for loading components at runtime to help shave off initial bundle size. You simply define a function that returns an object with a component property pointing to a promise that loads a component, then Vue takes care of the rest for you.
https://vuejs.org/v2/guide/components-dynamic-async.html#Handling-Loading-State
[Vue @Component] Load Vue Async Components
原文：https://www.cnblogs.com/Answer1215/p/9373746.html