Map computed field with vuex- map - fields

Introduction

When developing large-scale applications with Vue.js, Vuex is a crucial state management library that helps manage and maintain various states more effectively. Among them, vuex-map-fields is a Vuex helper tool that simplifies bidirectional data binding between form fields and the Vuex store.

Steps to Use vuex-map-fields

1. Install vuex-map-fields

First, you need to install vuex-map-fields in your project. If you haven't installed it yet, you can install it via npm:

bash
npm install vuex-map-fields

Or use yarn:

bash
yarn add vuex-map-fields

2. Import into Vuex Store

Assuming you already have a Vuex store set up, for example:

javascript
import Vue from 'vue';
import Vuex from 'vuex';

Vue.use(Vuex);

export default new Vuex.Store({
    state: {
        formData: {
            name: '',
            email: ''
        }
    },
    mutations: {
        updateName(state, name) {
            state.formData.name = name;
        },
        updateEmail(state, email) {
            state.formData.email = email;
        }
    }
});

3. Use mapFields to bind data

In your component, you can use mapFields to create computed properties that connect to the Vuex store state. You need to import the mapFields function from vuex-map-fields and use it in the computed properties:

javascript
import { mapFields } from 'vuex-map-fields';

export default {
    computed: {
        ...mapFields([
            'formData.name',
            'formData.email'
        ])
    }
};

After this setup, name and email will be bound as computed properties to the corresponding Vuex state. Any changes to these computed properties will automatically reflect in the Vuex state, and vice versa.

4. Use in template

Now you can use these data in your Vue template:

html
<template>
    <div>
        <input v-model="name" placeholder="Your name">
        <input v-model="email" placeholder="Your email">
    </div>
</template>

Here, the v-model binding ensures that user input data is reflected in the Vuex store in real-time, and updates to the store are reflected on the interface in real-time.

Summary

Using vuex-map-fields can greatly simplify the process of bidirectional data binding between Vuex and Vue components, especially when handling form data. With simple configuration, you can avoid writing extensive bidirectional data binding code, making the code more concise and maintainable.