Utilize `mapActions` or `mapGetters` in conjunction with Vuex 4 and Vue 3

Question

Utilize `mapActions` or `mapGetters` in conjunction with Vuex 4 and Vue 3

Is there a way to utilize mapState or mapGetters in Vue 3's setup function? I am aware that the useStore hook can be used to interact with the store, but it imports the entire store. On the other hand, using mapState or mapGetters allows us to specify a specific module:

// ...

computed: {
   ...mapGetters('myModule', [
      'myStateVariable'
   ]
) 

//...

javascript vue.js vuex vuejs3

Answer 1

Answer №1

Here is a potential solution:

import { computed }  from 'vue';
import { useStore } from 'vuex';

const moduleName = 'myModule';

export default {
    setup() {
        const store = useStore();

        return {
            // getter
            one: computed(() => store.getters[`${moduleName}/myStateVariable`],

            // state
            two: computed(() => store.state[moduleName].myStateVariable,
        };
    },
};

Answer 2

Here is a potential solution:

import { computed }  from 'vue';
import { useStore } from 'vuex';

const moduleName = 'myModule';

export default {
    setup() {
        const store = useStore();

        return {
            // getter
            one: computed(() => store.getters[`${moduleName}/myStateVariable`],

            // state
            two: computed(() => store.state[moduleName].myStateVariable,
        };
    },
};

Answer 3

Answer №2

It appears that the variables are compressed, making it impossible to access using myModule/myStateVariable, but simply myStateVariable should still work.

As Vuex moves towards RC releases, this behavior may change in the future. Currently, attempting to use the same getter twice will result in an error like the one shown below:

https://i.sstatic.net/tEetj.png

Answer 4

It appears that the variables are compressed, making it impossible to access using myModule/myStateVariable, but simply myStateVariable should still work.

As Vuex moves towards RC releases, this behavior may change in the future. Currently, attempting to use the same getter twice will result in an error like the one shown below:

https://i.sstatic.net/tEetj.png

Answer 5

Answer №3

Using Vue 3 and Vuex 4, I was able to achieve this setup: Let's assume we have a store structured like this:

https://i.sstatic.net/qBtrg.png

Our main store index.js (at the bottom) would look something like this:

 import { createStore, createLogger } from 'vuex';
 import module1 from '@/store/module1';
 import module2 from '@/store/module2';


 export default createStore({

 modules: {
    module1: module1,
    module2: module2,
 },
 plugins: process.env.NODE_ENV !== 'production'
 ? [createLogger()]
 : []
})

Each module would then have an index.js file like this:

import * as getters from './getters'
import * as actions from './actions'
import mutations from './mutations'


const state = {
  postId: 10111,
}

export default {
  namespaced: true,

  state,
  getters,
  actions,
  mutations,
  
}

The getter function in each module would be defined as follows:

export const getPostId = state => {
   return state.postId 
}

In a component, you can access the getters like this:

<template>
 <div>
   <div class="major_container">
     <p>{{ postIdFromModule1 }}</p>
     <p>{{ postIdFromModule2 }}</p>
  </div>
</div>
</template>
<script> 
import { computed } from "vue";
import { useStore } from "vuex";

export default {
 setup() {
   const store = useStore();

   const postIdFromModule1 = computed(() => store.getters["module1/getPostId"]);
   const postIdFromModule2 = computed(() => store.getters["module2/getPostId"]);

   return {
     postIdFromModule1,
     postIdFromModule2,
   };
  },
};
</script>

Now, your modules are properly namespaced and ready for use!

Answer 6

Using Vue 3 and Vuex 4, I was able to achieve this setup: Let's assume we have a store structured like this:

https://i.sstatic.net/qBtrg.png

Our main store index.js (at the bottom) would look something like this:

 import { createStore, createLogger } from 'vuex';
 import module1 from '@/store/module1';
 import module2 from '@/store/module2';


 export default createStore({

 modules: {
    module1: module1,
    module2: module2,
 },
 plugins: process.env.NODE_ENV !== 'production'
 ? [createLogger()]
 : []
})

Each module would then have an index.js file like this:

import * as getters from './getters'
import * as actions from './actions'
import mutations from './mutations'


const state = {
  postId: 10111,
}

export default {
  namespaced: true,

  state,
  getters,
  actions,
  mutations,
  
}

The getter function in each module would be defined as follows:

export const getPostId = state => {
   return state.postId 
}

In a component, you can access the getters like this:

<template>
 <div>
   <div class="major_container">
     <p>{{ postIdFromModule1 }}</p>
     <p>{{ postIdFromModule2 }}</p>
  </div>
</div>
</template>
<script> 
import { computed } from "vue";
import { useStore } from "vuex";

export default {
 setup() {
   const store = useStore();

   const postIdFromModule1 = computed(() => store.getters["module1/getPostId"]);
   const postIdFromModule2 = computed(() => store.getters["module2/getPostId"]);

   return {
     postIdFromModule1,
     postIdFromModule2,
   };
  },
};
</script>

Now, your modules are properly namespaced and ready for use!

Answer 7

Answer №4

If you want to effectively utilize the mapActions method in a Vue3 style Single File Component, the recommended approach is to include it within the setup() function's return statement.

import { mapActions } from "vuex"
setup() {
  return {
    ...mapActions("myModule", ["doSomething"])
  }
}

Answer 8

If you want to effectively utilize the mapActions method in a Vue3 style Single File Component, the recommended approach is to include it within the setup() function's return statement.

import { mapActions } from "vuex"
setup() {
  return {
    ...mapActions("myModule", ["doSomething"])
  }
}

Utilize `mapActions` or `mapGetters` in conjunction with Vuex 4 and Vue 3

Answer №1

Answer №2

Answer №3

Answer №4

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