What is vuex plugin?

The vuex plugin is an option hat exposes hooks for each mutation. It is a normal function that receives the store as the only argument. You can create your own plugin or use built-in plugins. The plugin skeleton would be as below,

const myPlugin = store => {
// called when the store is initialized
store.subscribe((mutation, state) => {
// called after every mutation.
// The mutation comes in the format of `{ type, payload }`.
})
}

After that plugin can be configured for plugins options as below,

const store = new Vuex.Store({
// ...
plugins: [myPlugin]
})