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Customize menu items in Vue Menu Bar component

Add or remove menu items

Menu items can be added or removed using the insertAfter, insertBefore and removeItems methods.

In the following example, the Europe menu items are added before the Oceania item, the Africa menu items are added after the Asia, and the South America and Mexico items are removed from menu.

Source
Preview
app.vue
<template>
<div>
<ejs-menu ref="menu" id="menu" :items='menuItems' :fields='menuFields' :created='onCreated'></ejs-menu>
</div>
</template>

<script>
import Vue from 'vue';
import { MenuPlugin } from "@syncfusion/ej2-vue-navigations";
import { enableRipple } from '@syncfusion/ej2-base';

enableRipple(true);
Vue.use(MenuPlugin);

export default {
   data: function() {
        return {
           menuItems:  [
            {
                continent: 'Asia',
                countries: [
                    { country: 'China' },
                    { country: 'India' },
                    { country: 'Japan' }
                ]
            },
            {
                continent: 'North America',
                countries: [
                    { country: 'Canada' },
                    { country: 'Mexico' },
                    { country: 'USA' }
                ]
            },
            {
                continent: 'South America',
                countries: [
                    { country: 'Brazil' },
                    { country: 'Colombia' },
                    { country: 'Argentina' }
                ]
            },
            {
                continent: 'Oceania',
                countries: [
                    { country: 'Australia' },
                    { country: 'New Zealand' },
                    { country: 'Samoa' },
                ]
            },
            { continent: 'Antarctica' }
        ],
        menuFields: {
            text: ['continent', 'country'],
            children: ['countries']
        }
     };
   },
   methods: {
       onCreated: function(args) {
            var insertItem = [
                {
                    continent: 'Europe',
                    countries: [
                        { country: 'Finland' },
                        { country: 'Austria' }
                    ]
                }
            ];
            this.$refs.menu.insertBefore(insertItem, 'Oceania', false);
            insertItem = [
                {
                    continent: 'Africa',
                    countries: [
                        { country: 'Nigeria' }
                    ]
                }
            ];
            this.$refs.menu.insertAfter(insertItem, 'Oceania', false);
            this.$refs.menu.removeItems(['South America', 'Mexico'], false);
       }
   }
}
</script>

<style>
@import "../node_modules/@syncfusion/ej2-base/styles/material.css";
@import "../node_modules/@syncfusion/ej2-popups/styles/material.css";
@import "../node_modules/@syncfusion/ej2-navigations/styles/material.css";

body {
    margin-top: 100px;
    text-align: center;
}

</style>

To process items with ID values, set isUnique to true.

Enable or disable menu items

You can enable and disable the menu items using the enableItems method in Menu. To enable menuItems, set the enable property in argument to true and vice-versa.

Install Syncfusion Buttons packages using below command.

npm install @syncfusion/ej2-vue-buttons --save

In the following example, the Directory header item, Conferences, and Music sub menu items are disabled.

Source
Preview
app.vue
<template>
    <div>
        <ejs-button ref='enableAll'  v-on:click.native="btnClick">Enable all items</ejs-button>
        <div class="menu-section">
            <ejs-menu ref="menu" id="menu" :items='menuItems' :created='onCreated' :beforeOpen='beforeOpen'></ejs-menu>
        </div>
    </div>
</template>

<script>
import Vue from 'vue';
import { MenuPlugin } from "@syncfusion/ej2-vue-navigations";
import { ButtonPlugin } from "@syncfusion/ej2-vue-buttons";
import { enableRipple } from '@syncfusion/ej2-base';

enableRipple(true);
Vue.use(MenuPlugin);
Vue.use(ButtonPlugin);

var disableItems = ['Conferences', 'Music', 'Directory'];

export default {
   data: function() {
        return {
           menuItems:  [
    {
        text: 'Events',
        items: [
            { text: 'Conferences' },
            { text: 'Music' },
            { text: 'Workshops' }
        ]
    },
    {
        text: 'Movies',
        items: [
            { text: 'Now Showing' },
            { text: 'Coming Soon' }
        ]
    },
    {
        text: 'Directory',
        items: [
            { text: 'Media Gallery' },
            { text: 'Newsletters' }
        ]
    },
    {
        text: 'Queries',
        items: [
            { text: 'Our Policy' },
            { text: 'Site Map' }
        ]
    },
    { text: 'Services' }
]
     };
   },
   methods: {
       beforeOpen: function(args) {
        for (var i = 0; i  < args.items.length; i++) {
            if (disableItems.indexOf(args.items[i].text) > -1) {
                this.$refs.menu.enableItems([args.items[i].text], false, false);
            }
        }
       },
       btnClick: function(event) {
           this.$refs.menu.enableItems(disableItems, true, false);
           disableItems = [];
       },
       onCreated: function(args) {
           this.$refs.menu.enableItems(disableItems, false, false);
       }
   }
}
</script>

<style>
@import "../node_modules/@syncfusion/ej2-base/styles/material.css";
@import "../node_modules/@syncfusion/ej2-buttons/styles/material.css";
@import "../node_modules/@syncfusion/ej2-popups/styles/material.css";
@import "../node_modules/@syncfusion/ej2-navigations/styles/material.css";

.menu-section {
    margin-top: 100px;
    text-align: center;
}

</style>

To disable sub menu items, use the beforeOpen event.

Hide or show menu items

You can show or hide the menu items using the showItems and hideItems methods.

Source
Preview
app.vue
<template>
    <div>
        <ejs-button ref='enableAll' v-on:click.native="btnClick">Show all items</ejs-button>
        <div class="menu-section">
            <ejs-menu ref="menu" id="menu" :items='menuItems' :created='onCreated' :beforeOpen='beforeOpen'></ejs-menu>
        </div>
    </div>
</template>

<script>
import Vue from 'vue';
import { MenuPlugin } from "@syncfusion/ej2-vue-navigations";
import { ButtonPlugin } from "@syncfusion/ej2-vue-buttons";
import { enableRipple } from '@syncfusion/ej2-base';

enableRipple(true);
Vue.use(MenuPlugin);
Vue.use(ButtonPlugin);

var hiddenItems = ['Workshops', 'Music', 'Movies'];

export default {
   data: function() {
        return {
           menuItems:  [
    {
        text: 'Events',
        items: [
            { text: 'Conferences' },
            { text: 'Music' },
            { text: 'Workshops' }
        ]
    },
    {
        text: 'Movies',
        items: [
            { text: 'Now Showing' },
            { text: 'Coming Soon' }
        ]
    },
    {
        text: 'Directory',
        items: [
            { text: 'Media Gallery' },
            { text: 'Newsletters' }
        ]
    },
    {
        text: 'Queries',
        items: [
            { text: 'Our Policy' },
            { text: 'Site Map' }
        ]
    },
    { text: 'Services' }
]
     };
   },
   methods: {
       beforeOpen: function(args) {
        for (var i = 0; i  < args.items.length; i++) {
            if (hiddenItems.indexOf(args.items[i].text) > -1) {
                this.$refs.menu.hideItems([args.items[i].text], false);
            }
        }
       },
       btnClick: function(event) {
           this.$refs.menu.showItems(hiddenItems, false);
           hiddenItems = [];
       },
       onCreated: function(args) {
           this.$refs.menu.hideItems(hiddenItems, false);
       }
   }
}
</script>

<style>
@import "../node_modules/@syncfusion/ej2-base/styles/material.css";
@import "../node_modules/@syncfusion/ej2-popups/styles/material.css";
@import "../node_modules/@syncfusion/ej2-navigations/styles/material.css";

.menu-section {
    margin-top: 100px;
    text-align: center;
}

</style>

Using the beforeOpen event, you can hide the sub menu items as in the above example since the menu supports to hide items only for headers initially.