Package Exports

vuex-map-fields

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Readme

vuex-map-fields

Enable two-way data binding for form fields saved in a Vuex store.

Install

npm install --save vuex-map-fields

Basic example

The following example component shows the most basic usage, for mapping fields to the Vuex store using two-way data binding with v-model, without directly modifying the store itself, but using getter and setter functions internally (as it is described in the official Vuex documentation: Two-way Computed Property).

Store

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

// Import the `updateField` mutation function
// from the `vuex-map-fields` module.
import { updateField } from 'vuex-map-fields';

Vue.use(Vuex);

export default new Vuex.Store({
  state: {
    fieldA: '',
    fieldB: '',
  },
  mutations: {
    // Add the `updateField` mutation to the
    // `mutations` of your Vuex store instance.
    updateField,
  },
});

Component

<template>
  <div id="app">
    <input v-model="fieldA">
    <input v-model="fieldB">
  </div>
</template>

<script>
import { mapFields } from 'vuex-map-fields';

export default {
  computed: {
    // The `mapFields` function takes an array of
    // field names and generates corresponding
    // computed properties with getter and setter
    // functions for accessing the Vuex store.
    ...mapFields([
      'fieldA',
      'fieldB',
    ]),
  },
};
</script>

Nested properties

Oftentimes you want to have nested properties in the Vuex store. vuex-map-fields supports nested data structures by utilizing the object dot string notation.

Store

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

import { updateField } from 'vuex-map-fields';

Vue.use(Vuex);

export default new Vuex.Store({
  state: {
    user: {
      firstName: '',
      lastName: '',
    },
    addresses: [
      {
        town: '',
      },
    ],
  },
  mutations: {
    updateField,
  },
});

Component

<template>
  <div id="app">
    <input v-model="firstName">
    <input v-model="lastName">
    <input v-model="town">
  </div>
</template>

<script>
import { mapFields } from 'vuex-map-fields';

export default {
  computed: {
    // When using nested data structures, the string
    // after the last dot (e.g. `firstName`) is used
    // for defining the name of the computed property.
    ...mapFields([
      'user.firstName',
      'user.lastName',
      // It's also possible to access
      // nested properties in arrays.
      'addresses[0].town',
    ]),
  },
};
</script>

Rename properties

Sometimes you might want to give your computed properties different names than what you're using in the Vuex store. Renaming properties is made possible by passing an object of fields to the mapFields function instead of an array.

<template>
  <div id="app">
    <input v-model="userFirstName">
    <input v-model="userLastName">
  </div>
</template>

<script>
import { mapFields } from 'vuex-map-fields';

export default {
  computed: {
    ...mapFields({
      userFirstName: 'user.firstName',
      userLastName: 'user.lastName',
    }),
  },
};
</script>

About

Author

Markus Oberlehner
Website: https://markus.oberlehner.net
Twitter: https://twitter.com/MaOberlehner
PayPal.me: https://paypal.me/maoberlehner

License

MIT