content/plugins/bootstrap-tagsinput/bootstrap-tagsinput.js

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(function ($) {
  "use strict";

  var defaultOptions = {
    tagClass: function(item) {
      return 'label label-info';
    },
    itemValue: function(item) {
      return item ? item.toString() : item;
    },
    itemText: function(item) {
      return this.itemValue(item);
    },
    freeInput: true,
    addOnBlur: true,
    maxTags: undefined,
    maxChars: undefined,
    confirmKeys: [13, 44],
    onTagExists: function(item, $tag) {
      $tag.hide().fadeIn();
    },
    trimValue: false,
    allowDuplicates: false
  };

  /**
   * Constructor function
   */
  function TagsInput(element, options) {
    this.itemsArray = [];

    this.$element = $(element);
    this.$element.hide();

    this.isSelect = (element.tagName === 'SELECT');
    this.multiple = (this.isSelect && element.hasAttribute('multiple'));
    this.objectItems = options && options.itemValue;
    this.placeholderText = element.hasAttribute('placeholder') ? this.$element.attr('placeholder') : '';
    this.inputSize = Math.max(1, this.placeholderText.length);

    this.$container = $('<div class="bootstrap-tagsinput"></div>');
    this.$input = $('<input type="text" placeholder="' + this.placeholderText + '"/>').appendTo(this.$container);

    this.$element.after(this.$container);

    var inputWidth = (this.inputSize < 3 ? 3 : this.inputSize) + "em";
    this.$input.get(0).style.cssText = "width: " + inputWidth + " !important;";
    this.build(options);
  }

  TagsInput.prototype = {
    constructor: TagsInput,

    /**
     * Adds the given item as a new tag. Pass true to dontPushVal to prevent
     * updating the elements val()
     */
    add: function(item, dontPushVal) {
      var self = this;