Encountering a "Unknown Mutation Type Error" when attempting to access Mutators in the Vuex Store from

Within my Vuex state, there is a specific number stored. Utilizing a computed property, I am able to access and utilize this number in my Vue component successfully. In the same Vue component, there exists a method that triggers a mutator function within the Vuex store. This mutator function's purpose is to alter the value of number to a random numerical value.

Despite these functionalities being set up, I have encountered issues when attempting to activate the mutator in the Vuex store. Upon trying to trigger the mutator, an error message presents itself:

[vuex] unknown mutation type: changeNumber

The changeNumber function is responsible for changing the value of number to a random number within the Vuex store.

The code provided below demonstrates the implementation. While direct access to the store is achievable using this.$store.state.number from the Vue component, the activation of the changeNumber mutator with

this.$store.commit('changeNumber')
seems to be failing. I have meticulously reviewed my syntax and consulted various tutorials, all of which have shown successful instances of utilizing this.$store.commit('mutation').

var store = new Vuex.Store({
    state: {
    number: -1
  },
  getters: {
    getNumber: function(state) {
      return state.number;
    }
  },
  mutations: {
    changeNumber: function(state) {
        state.number = Math.floor(Math.random() * 10);
    }
  }
});

var vm = new Vue({
    el: '#app',
  store: store,
  computed: {
    number: function() {
        return this.$store.getters.getNumber;
    }
  },
  methods: {
    generate: function() {
        this.$store.commit('changeNumber');
    }
  }
});

The accompanying HTML code is as follows:

<div v-cloak id="app">
  <button v-on:click="generate">Generate</button>
  <h3>{{ number }}</h3>
</div>

A live demonstration of this code can be accessed through the JSFiddle link provided here, if necessary. Any assistance offered would be greatly appreciated.

Answer №1

Use mutations instead of mutators

let shop = new Vuex.Store({
  state: {
    count: -1
  },
  getters: {
    getCount: function(state) {
      return state.count;
    }
  },
  mutations: {
    updateCount: function(state) {
        state.count = Math.floor(Math.random() * 10);
    }
  }
});

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