tag-it: a jQuery plugin

After looking for a jQuery plugin for handling a 'tag suggestion' form field, in much the same way ZenDesk.com does, I ended up developing a customization of jQuery UI that does the same interaction. Levy Carneiro Jr.

Demo

Check the example.html for a demo.

Usage

First, load jQuery, jQuery UI and the plugin:

<script src="js/jquery/jquery-1.4.2.min.js" type="text/javascript" charset="utf-8"></script>
<script src="js/jquery-ui/jquery-ui-1.8.core-and-interactions.min.js" type="text/javascript" charset="utf-8"></script>
<script src="js/jquery-ui/jquery-ui-1.8.autocomplete.min.js" type="text/javascript" charset="utf-8"></script>
<script src="js/tag-it.js" type="text/javascript" charset="utf-8"></script>

Notice, to make it work under IE you have to additionally load 'js/ie-compat.js'.

<script src="js/ie-compat.js" type="text/javascript" charset="utf-8"></script>

Now, let's attach it to an existing <ul> box:

<script type="text/javascript">
  $(document).ready(function() {
    $("#mytags").tagit();
  });
</script>

<ul id="mytags">
  <!-- Existing list items will be pre-added to the tags -->
  <li>Tag1</li>
  <li>Tag2</li>
</ul>

This will turn the list into a tag-it list:

<ul id="mytags" class="tagit">
  <!-- Existing list items will be pre-added to the tags -->
  <li class="tagit-choice">
    Tag1
    <a class="close">x</a>
    <input type="hidden" style="display:none;" value="Tag1" name="item[tags][]">
  </li>
  <li class="tagit-choice">
    Tag2
    <a class="close">x</a>
    <input type="hidden" style="display:none;" value="Tag2" name="item[tags][]">
  </li>
  <li class="tagit-new">
    <input class="tagit-input ui-autocomplete-input" type="text" autocomplete="off" role="textbox" aria-autocomplete="list" aria-haspopup="true">
  </li>
</ul>

Options

Tag-it accepts several options to customize the behaviour:

itemName (String)

Used to build the name of the hidden input field: itemName[fieldName][].

$("#mytags").tagit({
  itemName: "user"
});

Defaults to item.

fieldName (String)

Used to build the name of the hidden input field: itemName[fieldName][].

$("#mytags").tagit({
  fieldName: "skills"
});

Defaults to tags.

availableTags (Array)

Used as source for the autocompletion.

$("#mytags").tagit({
  availableTags: ["c++", "java", "php", "javascript", "ruby", "python", "c"]
});

Defaults to an empty array [].

onTagAdded (function, Callback)

Can be used to add custom behaviour before the Tag is added to the DOM. The function receives the tag as parameter.

$("#mytags").tagit({
  onTagAdded: function(tag) {
    // do something special
  }
});

onTagRemoved (function, Callback)

Can be used to add custom behaviour before the Tag is removed from the DOM. The function receives the tag as parameter.

$("#mytags").tagit({
  onTagRemoved: function(tag) {
    // do something special
  }
});

tagSource (function)

Can be overwritten in order to use custom autocompletion sources like Ajax requests. The default function filters the strings in availableTags and subtracts the already assigned tags.

removeConfirmation (boolean)

When removeConfirmation is enabled the user has to press the backspace key twice to remove the last tag. After the first keypress the last tag receives a remove css class which can be used to visually highlight the tag.

Defaults to false.

allowSpaces (boolean)

When allowSpaces is enabled the user is not required to wrap multi-word tags in quotation marks. ie. user can enter John Smith instead of "John Smith"

Defaults to false.

Authors

• Levy Carneiro Jr.
• Martin Rehfeld
• Tobias Schmidt
• Skylar Challand