javascript - webpack --hot hot reload is invalid problem

Question

webpack-dev-server --hot --port 8090 This command, hot reloading is invalid, how to configure it

Answer 1

Check if your port is occupied

Answer 2

When configuring HMR yourself, you need to install the corresponding dependencies of the front-end framework. For example, under the Vue system, you need to install the vue-hot-reload-api dependency. You can refer to this blog of mine:
http://ewind.us/2017/webpack-...

Answer 3

Modify port 8090 in config/index.js and try it. .

Answer 4

What’s wrong with closing the port when hot reloading is invalid?.
If there is a port conflict, even the devServer cannot be started.
An error message should be posted here