How do I call a getter from another getter in Vuex?

Question

In VueJS 2.0, you must pass both state and getters.

Getters are passed to other getters as the 2nd Argument:

export default foo = (state, getters) => {
    return getters.yourGetter
}

Official documentation: https://vuex.vuejs.org/guide/getters.html#property-style-access

Pass getters as the second argument to access local and non-namespaced getters. For namespaced modules, you should use rootGetters (as the 4th argument, in order to access getters defined within another module):

export default foo = (state, getters, rootState, rootGetters) => {
    return getters.yourGetter === rootGetters['moduleName/getterName']
}

Getters receive other getters as the 2nd argument

getters: {
  doneTodos: state => {
    return state.todos.filter(todo => todo.done)
  },
  doneTodosCount: (state, getters) => {
    return getters.doneTodos.length
  }
}

Here is a link to the official docs - https://vuex.vuejs.org/guide/getters.html#property-style-access

I Tested without state and didn't work. That's why state is necessary.

this works:

export default foo = (state, getters) => {
    return getters.yourGetter
}

this didn't work

export default foo = (getters) => {
    return getters.yourGetter
}