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A simple tags input with typeahead (autocomplete) built with Vue.js 2.
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README.md

Voerro Vue Tags Input v2

npm (scoped) npm MIT

A simple tags input with typeahead built with Vue.js 2.

Live Demo

Installation via NPM

npm i @voerro/vue-tagsinput --save-dev

or

npm i @voerro/vue-tagsinput --save

Then register the component with Vue:

import VoerroTagsInput from '@voerro/vue-tagsinput';

Vue.component('tags-input', VoerroTagsInput);

Include the dist/style.css file on your page to apply the styling. You can use CDN, require() it inside your JS code, or @include it inside your (S)CSS assets. Read the Styling section to learn how to customize the appearance.

Installation via CDN

If you're not using NPM, you can include the required files into your page manually from a CDN. Don't forget to include Vue as well. For example:

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.13/vue.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/@voerro/vue-tagsinput@2.0.2/dist/voerro-vue-tagsinput.js"></script>

<script>
    new Vue({
        el: '#app',
        components: { "v-tags-input": VoerroTagsInput },
    });
</script>

Include the CSS file on your page to apply the styling. Read the Styling section to learn how to customize the appearance.

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@voerro/vue-tagsinput@2.0.2/dist/style.css">

IMPORTANT: Always grab the latest versions of the package from JSDELIVR, the ones provided in the examples above might be outdated. Same goes for Vue.js.

Usage

<tags-input element-id="tags"
    v-model="selectedTags"
    :existing-tags="[
        { key: 'web-development', value: 'Web Development' },
        { key: 'php', value: 'PHP' },
        { key: 'javascript', value: 'JavaScript' },
    ]"
    :typeahead="true"></tags-input>
<tags-input element-id="tags"
    v-model="selectedTags"
    :existing-tags="[
        { key: 1, value: 'Web Development' },
        { key: 2, value: 'PHP' },
        { key: 3, value: 'JavaScript' },
    ]"
    :typeahead="true"></tags-input>

element-id will be applied to id and name attributes of the hidden input that contains the list of the selected tags as its value. Optionally you can also use the v-model directive to bind a variable to the array of selected tags.

existing-tags is the list of the existing on your website tags. Include it even if you're not using typeahead.

Remove the typeahead property to disable this functionality.

Setting Selected Tags Programmatically

If you need to programmatically (manually) set or change the list of selected tags from "outside" - just set the required value to the variable bound with the component via v-model.

For example, the variable name is selectedTags:

<tags-input element-id="tags" 
    v-model="selectedTags"></tags-input>

You can pre-set the value of this variable:

new Vue({
    el: '#app',

    components: { VoerroTagsInput },

    data: {
        selectedTags: [
            { key: 'web-development', value: 'Web Development' },
            { key: 'php', value: 'PHP' },
            { key: 'javascript', value: 'JavaScript' },
        ],
    }
});

... or change it whenever you need to:

new Vue({
    el: '#app',

    components: { VoerroTagsInput },

    data: {
        selectedTags: [],
    },

    methods: {
        setSelectedTags() {
            this.selectedTags = [{ key: 'php', value: 'PHP' }];
        }
    }
});

All Available Props

Prop Type Default Description
elementId String - id & name for the hidden input.
existing-tags Array [] An array with existing tags in the following format: [{ key: 'id-or-slug-of-the-tag', value: 'Tag\'s text representation' }, {...}, ...]
typeahead Boolean false Whether the typeahead (autocomplete) functionality should be enabled.
typeahead-style String 'badges' The autocomplete prompt style. Possible values: badges, dropdown.
typeahead-max-results Number 0 Maximum number of typeahead results to be shown. 0 - unlimited.
typeahead-activation-threshold Number 1 Show typeahead results only after at least this many characters were entered. When set to 0, typeahead with all the available tags will be displayed on input focus.
typeahead-always-show Boolean false Always show typeahead, even if not focused or under typeahead-activation-threshold.
typeahead-hide-discard Boolean false Hides the 'Discard Search Results' option.
placeholder String 'Add a tag' The placeholder of the tag input.
discard-search-text String 'Discard Search Results' The 'Discard Search Results' button text.
limit Number 0 Limit the number of tags that can be chosen. 0 = no limit.
only-existing-tags Boolean false Only existing tags can be added/chosen. New tags won't be created.
case-sensitive-tags Boolean false Determines whether tags are case sensitive. Setting this to true would allow tags like php, PHP, PhP, and so on to be added at the same time.
delete-on-backspace Boolean true Whether deleting tags by pressing Backspace is allowed.
allow-duplicates Boolean false Allow users to add the same tags multiple times.
validate Function text => true Callback to validate tags' text with.
add-tags-on-comma Boolean false Add new tags when comma is pressed. The search (typeahead) results are ignored.
add-tags-on-space Boolean false Add new tags when space is pressed. The search (typeahead) results are ignored.
add-tags-on-blur Boolean false Add new tags when on the input is blur. The search (typeahead) results are ignored.
sort-search-results Boolean true Whether the search results should be sorted.
before-adding-tag Function tag => true Callback to perform additional checks and actions before a tag is added. Return true to allow a tag to be added or false to forbid the action.
before-removing-tag Function tag => true Callback to perform additional checks and actions before a tag is removed. Return true to allow a tag to be added or false to forbid the action.

Events

Event Description
@initialized Fired when the component is completely ready to be worked with. Fired from the Vue.js' mounted() method.
@tag-added Fired when a new tag is added. The slug of the tag is passed along.
@tag-removed Fired when a tag is removed. The slug of the tag is passed along.
@tags-updated Fired when a tag is added or removed.
@limit-reached Fired when the limit of tags is reached
@keydown Fires on a keydown event
@keyup Fires on a keyup event
@focus Fired when the input is focused
@blur Fired when the input is blurred
@change Fired when the input text changes
<voerro-tags-input
    ...
    @initialized="onInitialized"
    @tag-added="onTagAdded"
    @tag-removed="onTagRemoved"
    @tags-updated="onTagsUpdated"
    @limit-reached="onLimitReached"
    @keydown="onKeyDown"
    @keyup="onKeyUp"
    @focus="onFocus"
    @blur="onBlur"
    @change="onChange"
></voerro-tags-input>
<script>
new Vue({
    ...

    methods: {
        onInitialized() {
            console.log('Initialized');
        },

        onTagAdded(slug) {
            console.log(`Tag added: ${slug}`);
        },

        onTagRemoved(slug) {
            console.log(`Tag removed: ${slug}`);
        },

        onTagsUpdated() {
            console.log('Tags updated');
        },
        
        onLimitReached() {
            console.log('Max Reached');
        },

        onKeyDown() {
            console.log('Key down');
        },

        onKeyUp() {
            console.log('Key up');
        },

        onFocus() {
            console.log('Input focused');
        },

        onBlur() {
            console.log('Input blurred');
        },

        onChange(value) {
            console.log(`Input changed: ${value}`);
        }
    }
});
</script>

Data

You can bind the array of selected tags to a variable via v-model. A tag object within the array looks like this:

{ key: 'web-development', value: 'Web Development' }

key is whatever unique key you use for the tags in your project. It could be a unique slug, it could be a unique numeric id, it could be something else. value is the text representation of a tag.

There's also a hidden text input, which has the stringified version of the array of selected tags as its value. The name and id of the input equal to whatever you set to the element-id prop.

The tags that don't exist in the existing-tags array will have its key equal to an empty string ''. In your backend you can consider these tags as to be created.

Styling

If you want to completely re-style the component - write your own styles from scratch using dist/style.css as a reference. Alternatively you can override specific parts of dist/style.css using !important.

Certain classes/styles can be overridden via component props on a per instance basis in case you just want to make minor changes, e.g. you just want to change colors.

Prop Default class Area
wrapper-class tags-input-wrapper-default Outer appearance of the input - a wrapper providing a border and padding around the selected tags. If you're using CSS frameworks, you could use the frameworks' native classes, e.g. form-control for Bootstrap or input for Bulma.

Using Typeahead (Autocomplete)

When search results are displayed underneath the input, use the arrow down and arrow up keys on the keyboard to move the selection. Press Enter to select a tag. Press Esc to discard the search results and then Enter to add a new tag the way you've typed it.

Updating From Older Versions

Older versions up to v1.5.0 -> v1.5.1

See the v1 branch for details.

v1.5.1 and above -> v2.*

A pretty serious bug (#53) was fixed in v2.0.0. The data format for the existing-tags prop and the v-model directive has been changed. You can find the new format in this documentation, see above.

Changelog

v.2.0.2

v.2.0.1

  • Fix: broken dropdown
  • Fix: typeahead/autocomplete doesn't show up on Android
  • Fix: Add Tags on Comma doesn't work on Android
  • Fix: Mobil users cannot press Esc to discard search results, so added a "Discard search results" button which seemlessly blends into the typeahead (both badges and dropdown).
  • New: limit-reached prop

v.2.0.0

  • The data format for the existing-tags prop and the v-model directive has been changed

Contribution

Everyone is welcome to contribute. When making a contribution, please base your branch off of dev and merge it into dev as well. Thank you!

Support

This software is absolutely free to use and is developed in the author's free time. If you found this software useful and would like to say thank you to the author, please consider making a donation. It's not the amount, it's the gesture.

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