Version

15.9.8

Reproduction link

https://github.com/zhangyuang/vue-loader-ssr-bug.git

Steps to reproduce

yarn && npm start

What is expected?

this.$style can be read the exact value in server and client side。

What is actually happening?

In server side this.$style value is {default : val}
In client side this.$style value is exact value

By read the source code, vue-loader must be used with vue-style-loader to avoid the problem.But i needn't use vue-style-loader。Maybe vue-loader should fix the case by itself