tags-input-component

Usage

Import the script in your code and create a new tags-input:

<head>
  <script src="tags-input.js"></script> 
</head>
 
<body>
  <tags-input data-multiple></tags-input>
</body>

Woot, you have a tags-input! However, tags-input only provides the element. The rest is up to you. To properly handle the element, we need to listen for some events and react accordingly.

// Test data
var data = ['Amy', 'Annalise', 'Casey', 'Erica', 'Fong', 'George', 'Jason', 'Jen', 'Jim', 'Josh', 'Kelly', 'Kevin', 'Maggie', 'Nathan', 'Ryland', 'SaVance', 'Trezy', 'Vannessa', 'YJ', 'Zach']
 
// Grad a reference to our tags-input
var tagsInput = document.querySelector('tags-input')
 
// Listen for the user to start typing
tagsInput.addEventListener('search', function (event) {
  // Clear the current options
  tagsInput.clearOptions()
 
  // The current value of the tags-input is going to be available in event.detail
  var query = event.detail
 
  // Create an array to proxy our test data matches
  var options = []
 
  // Create a regex based on our query
  var regex = new RegExp(query, 'i')
 
  // Loop through our test data
  data.forEach(function (datum) {
    // If the datum matches, add it to our options array
    if (regex.test(datum)) {
      options.push(datum)
    }
  })
 
  // Pass our options array to the tags-input so it can display them in the dropdown
  tagsInput.updateOptions(options)
})

You can also check out a live demo here.

API

`tags-input` element

This is where it all begins. a tags-input element can be mostly configured via attributes.

Attribute	Default	Required/Optional	Description
`data-debug`	false	optional	Turns on debugging for this `tags-input`. When an element is created with this attribute, it will log out all of its configuration oprions, as well as logging out on all events.
`data-duplicates`	false	optional	Allow values to be duplicated.
`data-multiple`	false	optional	Allow the user to add more than one tag.
`data-new`	false	optional	Allow the user to create tags that are not in the options list.

Any of these attributes can be set as a boolean attribute, e.g. <tags-input data-multiple>, or an attribute with a boolean string, e.g. <tags-input data-multiple="true" data-new="false">.

Events

The tags-input element works much like a regular input element. In addition to triggering the same events as a regular input element, it also triggers some unique events that make it easier to react to changes in the tags-input.

`add`

This event is triggered when a tags-input's input is converted to a tag. The tag that was added can be accessed via event.detail.

tagsInput.addEventListener('add', function (event) {
  console.log(event.detail)
})

`error`

This event is triggered when the user tries to add an invalid tag, or a duplicate tag if the tags-input doesn't have the allow-new property. The event.detail property will contain a string of either invalid or duplicate depending on what the error was.

tagsInput.addEventListener('error', function (event) {
  console.log(event.detail)
})

`remove`

This event is triggered when a tag is removed from a tags-input. The tag that was removed can be accessed via event.detail.

tagsInput.addEventListener('remove', function (event) {
  console.log(event.detail)
})

`search`

The search event is the main event used for managing a tags-input. This is fired every time the user changes the content of the input -- much like the input event. The main difference is that the search event includes the full content of the input, rather than just the key pressed. This can be accessed via event.detail.

tagsInput.addEventListener('search', function (event) {
  console.log(event.detail)
})

Methods

The tags-input element exposes methods to make it easier to interact with.

`clearInput()`

Empties the contents of the tags-input's text box. This does not remove tags.

`clearOptions()`

Empties the contents of the dropdown list. This is useful when using updateOptions with merge set to true.

`updateOptions(options, merge)`

Pass an array of options to be displayed in the dropdown list. Options can be either strings or objects. Objects must have a value property which will be displayed, and may optionally have an id property.

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