Tagify - lightweight input "tags" script

Transforms an input field or a textarea into a Tags component, in an easy, customizable way, with great performance and tiny code footprint.

See Demos

Selling points

• supports whitelist (with native suggestions dropdown as-you-type)
• supports blacklists
• JS file is under 150 very readiable lines of code
• JS weights less than ~10kb
• SCSS file is ~2kb of highly readable and flexible code
• No other inputs are used beside the original, and its value is kept in sync
• Can paste in multiple values ("tag 1, tag 2, tag 3")
• Automatically disallow duplicate tags (vis "settings" object)
• Tags can be created by commas or by pressing the "Enter" key
• Tags can be trimmed via hellip by giving max-width to the tag element in your CSS
• Easily customized
• Exposed custom events (Add, Remove, Invalid, Duplicate)

building the project

Simply run gulp in your terminal, from the project's path (Gulp should be installed first)

Basic usage

Lets say this is your markup, and you already have a value set on the input (which was pre-filled by data from the server):

<input name='tags' placeholder='write some tags' value='foo, bar,buzz'>
<textarea name='tags' placeholder='write some tags'>foo, bar,buzz</textarea>

What you need to do to convert that nice input into "tags" is simply select your input/textarea and run tagify():

// vanilla component
var input = document.querySelector('input[name=tags]'),
    tagify = new Tagify( input );

// with settings passed
tagify = new Tagify( input, {
    duplicates: true,
    whitelist: ['foo', 'bar'],
    callbacks: {
        add : onAddTag // calls an imaginary "onAddTag" function when a tag is added
    }
});

// listen to custom tags' events such as 'add' or 'remove'
tagify1.on('remove', ()=>{
    console.log(e, e.detail);
});

The value of the Tagify component can be accessed like so:

var tagify = new Tagify(...);
console.log( tagify.value )
// [{"value":"tag1"}, {"value":"tag2"}, ...]

If the Tags were added with custom properties, the value output might look something like this:

tagify.value
// [{ "value":"tag1", "class":"red", "id":1}, ...]

Tags with properties (example)

The below example will populate the Tags component with 2 tags, each with specific attributes & values. the addTags method accepts an Array of Objects with any key/value, as long as the value key is defined.

var input = document.querySelector('input[name=tags]'),
    tagify = new Tagify( input );

tagify.addTags([
    {
        "value"   : "strawberry",
        "data-id" : 8,
        "class"   : 'color-red'
    },
    {
        "value"   : "blueberry",
        "data-id" : 6,
        "class"   : 'color-purple'
    }
])

The above will output:

<tags>
    <tag class="color-red" data-id="8" value="strawberry">...</tag>
    <tag class="color-purple" data-id="6" value="blueberry">...</tag>
</tags>

jQuery plugin version (jQuery.tagify.js)

$('[name=tags]')
    .tagify()
    .on('add', function(e, tagName){
        console.log('added', tagName)
    });

Now markup be like:

<tags>
    <tag>
        <x></x>
        <div><span title="css">css</span></div>
    </tag>
    <tag>
        <x></x>
        <div><span title="html">html</span></div>
    </tag>
    <tag>
        <x></x>
        <div><span title="javascript">javascript</span></div>
    </tag>
    <div>
        <input list="tagsSuggestions3l9nbieyr" class="input placeholder">
        <datalist id="tagsSuggestions3l9nbieyr">
            <label> select from the list:
                <select>
                    <option value=""></option>
                    <option>foo</option>
                    <option>bar</option>
                </select>
            </label>
        </datalist><span>write some tags</span>
    </div>
    <input name="tags" placeholder="write some tags" value="foo, bar,buzz">
</tags>

Methods

Exposed events

Settings