What steps should I follow to generate reusable external functions in Vue?

With the growth of my project, I've started to notice a lot of repetitive elements. One area that stands out is the navigation buttons, which appear in multiple locations like the side menu and navbar.

To streamline this process, I want to centralize the navigation items and have components import them as needed. To achieve this, I created a separate file called 'menuItems.js' to store all my menu items:

// menuItems.js

export default {
    data() {
        return {
            items: [
                { title: 'Profile', icon: 'mdi-account-circle', reqAuth: true, hideOnAuth: false},
                { title: 'Dashboard', icon: 'mdi-view-dashboard', reqAuth: true, hideOnAuth: false },
                { title: 'Settings', icon: 'mdi-cog', reqAuth: true, hideOnAuth: false },
                { title: 'Signup', icon: 'mdi-account-circle-outline', reqAuth: false, hideOnAuth: true},
                { title: 'Login', icon: 'mdi-login', reqAuth: false, hideOnAuth: true  },
                { title: 'Logout', icon: 'mdi-logout', reqAuth: true, hideOnAuth: false},
            ]
        }
    },
    methods: {
        menuItems: function(authenticated) {
            if (!authenticated) {
                // Retrieves items that require authentication or don't, excluding those that should be hidden once authenticated
                return this.items.filter(o => o.reqAuth || !o.reqAuth && !o.hideOnAuth)
            }
            // Retrieves items that don't require authentication
            return this.items.filter(o => !o.reqAuth)
        }
    }
}

The buttons can vary in visibility requirements based on authentication status and can also be hidden once authenticated (e.g., the login button).

Now, let's say I have a Vue component for my navbar - how can I incorporate the method that returns the filtered items?

// NavBarComponent.vue

<template>
    <div>
        <v-btn v-for="(item, i) in menuItems(authenticated)">
            {{ item.title }}
        </v-btn>
    </div>

</template>

<script>
    export default {
        name: "NavBarComponent",
        data() {
            return {
                authenticated: true,
            }
        },
        methods {

        }
    }
</script>

In this scenario, how can I make the menuItems method in the component refer to the external file responsible for filtering the items?

Answer №1

If you want to keep your component clean and organized, consider creating a mixin file to house your methods. By applying the mixin to your component, you can easily access these shared functionalities.

For more information on mixins in Vue.js, check out: https://v2.vuejs.org/v2/guide/mixins.html

Here's an example of how your mixin file could be structured:

// /mixins/menuItemsMixin.js
const menuItemsMixin= {
  data() {
        return {
            items: [
                { title: 'Profile', icon: 'mdi-account-circle', reqAuth: true, hideOnAuth: false},
                { title: 'Dashboard', icon: 'mdi-view-dashboard', reqAuth: true, hideOnAuth: false },
                { title: 'Settings', icon: 'mdi-cog', reqAuth: true, hideOnAuth: false },
                { title: 'Signup', icon: 'mdi-account-circle-outline', reqAuth: false, hideOnAuth: true},
                { title: 'Login', icon: 'mdi-login', reqAuth: false, hideOnAuth: true  },
                { title: 'Logout', icon: 'mdi-logout', reqAuth: true, hideOnAuth: false},
            ]
        }
    },
    methods: {
        menuItems: function(authenticated) {
            if (!authenticated) {
                // Get items that require authentication or should not be hidden when authenticated
                return this.items.filter(o => o.reqAuth || !o.reqAuth && !o.hideOnAuth)
            }
            // Get items that do not require authentication
            return this.items.filter(o => !o.reqAuth)
        }
    }
};

export default menuItemsMixin

To use this mixin in your component, simply import it and include it in the mixins array:

// NavBarComponent.vue

<script>
    import menuItemsMixin from './mixins/menuItemsMixin.js'
    export default {
        mixins:[menuItemsMixin]
    }
</script>

You have the flexibility to import and use this mixin in multiple components, allowing for easy reusability and the addition of unique methods specific to each component.

Answer №2

After some deliberation, I decided to develop a custom JavaScript file:

// navigation.js

export const navigation = [
    {title: 'Dashboard'},
    {title: 'Profile'},
    {title: 'Login/Signup'},
]

Subsequently, within my navbar component, I integrated it in the following manner:

    import {mapGetters} from "vuex";
    import {navigation} from "../../common/navigation";

    export default {
        data: () => ({
            items: navigation
        }),

        computed: {
            ...mapGetters(['isAuthenticated',])
            menuItems: function (){
                if (this.isAuthenticated) {
                    // carry out this action
                } else {
                    // perform this task
                }
            },
        }
    }

Furthermore, I replicated the process for the filtering functionality, but I can also customize it accordingly for each component if necessary. I ascertain the authentication state using Vuex's store and fetch it with mapgetters.

<componentA v-if='isAuthenticated'>
     <navItem v-for='item in menuItems'>
</componentA>

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