Tags for Bootstrap 4/5

How to use

An ES6 native replacement for select using standards Bootstrap 5 (and 4) styles.

(almost) No additional CSS needed! Supports creation of new tags.

import Tags from "./tags.js";
Tags.init();
// Tags.init(selector, opts);
// You can pass global settings in opts that will apply
// to all Tags instances

By default, only provided options are available. Validation error will be displayed in case of invalid tag.

<label class="form-label" for="tags-input">Tags</label>
<select multiple="" name="tags[]" id="tags-input" class="form-select">
  <option value="" hidden="" disabled="">Choose a tag...</option>
  <option selected="selected" value="1">Apple</option>
  <option value="2">Banana</option>
  <option value="3">Orange</option>
</select>
<div class="invalid-feedback">Please select a valid tag.</div>

Creation of new tags

Use attribute data-allow-new to allow creation of new tags. Their default value will be equal to the text. Since you can enter arbitrary text, no validation will occur.

<select data-allow-new="true" multiple="" name="tags[]" id="tags-input" class="form-select"></select>

You can force these new tags to respect a given regex.

NOTE: don't forget the [] if you need multiple values!

Server side support

You can also use options provided by the server. This script expects a json response that is an array or an object with the data key containing an array.

Simply set data-server where your endpoint is located. It should provide an array of value/label objects. The suggestions will be populated upon init except if data-live-server is set, in which case, it will be populated on type. A ?query= parameter is passed along with the current value of the searchInput.

You can preselect values either by using data-selected or by marking the suggestion as selected in the json result.

<label class="form-label" for="validationTagsJson">Tags (server side)</label>
<select data-live-server="1" data-server="demo.json" data-allow-new="true" multiple="" name="tags_json[]" id="validationTagsJson" class="form-select">
  <option value="" hidden="" disabled="">Choose a tag...</option>
</select>

You can pass additionnal parameters with data-server-params and choose the method with data-server-method (GET or POST).

Setting data programmatically

You can use the items config key to pass options. These will be added to the select object. Items can be an array of Suggestions, or a key:value object.

You can also call setData manually.

Options

Options can be either passed to the constructor (eg: optionName) or in data-option-name format. You can also use the data-config attribute with a json encoded string.

Any of these config option can be changed later with setConfig.

To know more about these features, check the demo!

Callbacks

EventCallback ⇒ void

ServerCallback ⇒ Promise

ErrorCallback ⇒ void

ModalItemCallback ⇒ Promise

RenderCallback ⇒ String

ItemCallback ⇒ void

ValueCallback ⇒ void

AddCallback ⇒ void | Boolean

CreateCallback ⇒ void

Tips

• You can also use it on single selects! 😃
• Use arrow down to show dropdown
• If you have a really long list of options, a scrollbar will be used
• Access Tags instance on a given element with Tags.getInstance(mySelect)

Style

While styling is not mandatory, some pseudo styles may help align your styles with a regular bootstrap form-control We basically replicate input state as pseudo classes on the form-control container

• Support focus styles by implementing a pseudo class form-control-focus
• Support improved floating labels by implementing a pseudo class form-placeholder-shown
• Support disabled styles by implementing a pseudo class form-control-disabled

These styles can be found in _tags.scss

You can also use the tags-pure.scss file which provide you a css vars only version of the required styles (works well with bootstrap 5.3)

Without Bootstrap 5

Bootstrap 4 support

Even if it was not the initial idea to support Bootstrap 4, this component is now compatible with Bootstrap 4 because it only requires minimal changes.

Check out demo-bs4.html

Standalone usage

Obviously, this package works great with the full bootstrap library, but you can also use it without Bootstrap or with a trimmed down version of it

Actually, this library doesn't even use the js library to position the dropdown menu, so its only dependencies is on css classes. You can check out the .scss file to see how to reduce bootstrap 5 css to a smaller size.

Check out demo-standalone.html

Demo

https://codepen.io/lekoalabe/pen/ExWYEqx

How does it look ?

Do you need to init this automagically ?

You can now use this as a custom element as part of my Formidable Elements collection.

Or you can use Modular Behaviour (see demo)

Browser supports

Modern browsers (edge, chrome, firefox, safari... not IE11). Add a warning if necessary.

Also check out

• Bootstrap5 autocomplete: the autocomplete input for bootstrap 5 (and more!)
• BS Companion: the perfect bootstrap companion
• Admini: the minimalistic bootstrap 5 admin panel

How to contribute

If you want to make a PR, please make your changes in tags.js and do not commit any build files They will be updated upon release of a new version.

If you want to test your changes, simply run npm start and test in demo.html (feel free to add new test cases).

For scss updates, apply changes to scss files. They need to be compiled manually since they are not meant to be used by themselves.