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Bootstrap's Typeahead plugin extended (allowing for AJAX functionality) among other things

This is an extension to Bootstrap Typeahead that adds minimal but powerful extensions.

For example, process typeahead list asynchronously and return objects

  # This example does an AJAX lookup and is in CoffeeScript
  $('.typeahead').typeahead(
    # source can be a function
    source: (typeahead, query) ->
      # this function receives the typeahead object and the query string
      $.ajax(
        url: "/lookup/?q="+query
        # i'm binding the function here using CoffeeScript syntactic sugar,
        # you can use for example Underscore's bind function instead.
        success: (data) =>
          # data must be a list of either strings or objects
          # data = [{'name': 'Joe', }, {'name': 'Henry'}, ...]
          typeahead.process(data)
      )
    # if we return objects to typeahead.process we must specify the property
    # that typeahead uses to look up the display value
    property: "name"
  )

For example, process typeahead list synchronously and fire a callback on selection

  // This example is in Javascript, collects html in some li's and returns it
  $('.typeahead').typeahead({
    source: function (typeahead, query) {
      var return_list = []
      $("li").each(function(i,v){
        return_list.push($(v).html())
      })
      // here I'm just returning a list of strings
      return return_list
    },
    // typeahead calls this function when a object is selected, and
    // passes an object or string depending on what you processed, in this case a string
    onselect: function (obj) {
      alert('Selected '+obj)
    }

  })

and a very simple example, showing you can pass list of objects as source, and get that object via onselect

  $('.typeahead').typeahead({
    // note that "value" is the default setting for the property option
    source: [{value: 'Charlie'}, {value: 'Gudbergur'}, ...],
    onselect: function(obj) { console.log(obj) }
  })

Note that onselect works without source as a function and vice versa. Events may be a cleaner solution to passing callbacks and using bind all over the place, but I tried to strike a balance between modifying the core source too much and adding functionality, so until further improvements on the original Typeahead source I think these additions are very helpful.

Gudbergur Erlendsson, reach me here or gudbergur at gmail

/* =============================================================
* bootstrap-typeahead.js v2.0.0
* http://twitter.github.com/bootstrap/javascript.html#typeahead
* =============================================================
* Copyright 2012 Twitter, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============================================================ */
!function( $ ){
"use strict"
var Typeahead = function ( element, options ) {
this.$element = $(element)
this.options = $.extend({}, $.fn.typeahead.defaults, options)
this.matcher = this.options.matcher || this.matcher
this.sorter = this.options.sorter || this.sorter
this.highlighter = this.options.highlighter || this.highlighter
this.$menu = $(this.options.menu).appendTo('body')
this.source = this.options.source
this.onselect = this.options.onselect
this.strings = true
this.shown = false
this.listen()
}
Typeahead.prototype = {
constructor: Typeahead
, select: function () {
var val = JSON.parse(this.$menu.find('.active').attr('data-value'))
, text
if (!this.strings) text = val[this.options.property]
else text = val
this.$element.val(text)
if (typeof this.onselect == "function")
this.onselect(val)
return this.hide()
}
, show: function () {
var pos = $.extend({}, this.$element.offset(), {
height: this.$element[0].offsetHeight
})
this.$menu.css({
top: pos.top + pos.height
, left: pos.left
})
this.$menu.show()
this.shown = true
return this
}
, hide: function () {
this.$menu.hide()
this.shown = false
return this
}
, lookup: function (event) {
var that = this
, items
, q
, value
this.query = this.$element.val()
if (typeof this.source == "function")
value = this.source(this, this.query)
if (value)
this.process(value)
else
this.process(this.source)
}
, process: function (results) {
var that = this
, items
, q
if (results.length && typeof results[0] != "string")
this.strings = false
this.query = this.$element.val()
if (!this.query) {
return this.shown ? this.hide() : this
}
items = $.grep(results, function (item) {
if (!that.strings)
item = item[that.options.property]
if (that.matcher(item)) return item
})
items = this.sorter(items)
if (!items.length) {
return this.shown ? this.hide() : this
}
return this.render(items.slice(0, this.options.items)).show()
}
, matcher: function (item) {
return ~item.toLowerCase().indexOf(this.query.toLowerCase())
}
, sorter: function (items) {
var beginswith = []
, caseSensitive = []
, caseInsensitive = []
, item
, sortby
while (item = items.shift()) {
if (this.strings) sortby = item
else sortby = item[this.options.property]
if (!sortby.toLowerCase().indexOf(this.query.toLowerCase())) beginswith.push(item)
else if (~sortby.indexOf(this.query)) caseSensitive.push(item)
else caseInsensitive.push(item)
}
return beginswith.concat(caseSensitive, caseInsensitive)
}
, highlighter: function (item) {
return item.replace(new RegExp('(' + this.query + ')', 'ig'), function ($1, match) {
return '<strong>' + match + '</strong>'
})
}
, render: function (items) {
var that = this
items = $(items).map(function (i, item) {
i = $(that.options.item).attr('data-value', JSON.stringify(item))
if (!that.strings)
item = item[that.options.property]
i.find('a').html(that.highlighter(item))
return i[0]
})
items.first().addClass('active')
this.$menu.html(items)
return this
}
, next: function (event) {
var active = this.$menu.find('.active').removeClass('active')
, next = active.next()
if (!next.length) {
next = $(this.$menu.find('li')[0])
}
next.addClass('active')
}
, prev: function (event) {
var active = this.$menu.find('.active').removeClass('active')
, prev = active.prev()
if (!prev.length) {
prev = this.$menu.find('li').last()
}
prev.addClass('active')
}
, listen: function () {
this.$element
.on('blur', $.proxy(this.blur, this))
.on('keypress', $.proxy(this.keypress, this))
.on('keyup', $.proxy(this.keyup, this))
if ($.browser.webkit || $.browser.msie) {
this.$element.on('keydown', $.proxy(this.keypress, this))
}
this.$menu
.on('click', $.proxy(this.click, this))
.on('mouseenter', 'li', $.proxy(this.mouseenter, this))
}
, keyup: function (e) {
e.stopPropagation()
e.preventDefault()
switch(e.keyCode) {
case 40: // down arrow
case 38: // up arrow
break
case 9: // tab
case 13: // enter
if (!this.shown) return
this.select()
break
case 27: // escape
this.hide()
break
default:
this.lookup()
}
}
, keypress: function (e) {
e.stopPropagation()
if (!this.shown) return
switch(e.keyCode) {
case 9: // tab
case 13: // enter
case 27: // escape
e.preventDefault()
break
case 38: // up arrow
e.preventDefault()
this.prev()
break
case 40: // down arrow
e.preventDefault()
this.next()
break
}
}
, blur: function (e) {
var that = this
e.stopPropagation()
e.preventDefault()
setTimeout(function () { that.hide() }, 150)
}
, click: function (e) {
e.stopPropagation()
e.preventDefault()
this.select()
}
, mouseenter: function (e) {
this.$menu.find('.active').removeClass('active')
$(e.currentTarget).addClass('active')
}
}
/* TYPEAHEAD PLUGIN DEFINITION
* =========================== */
$.fn.typeahead = function ( option ) {
return this.each(function () {
var $this = $(this)
, data = $this.data('typeahead')
, options = typeof option == 'object' && option
if (!data) $this.data('typeahead', (data = new Typeahead(this, options)))
if (typeof option == 'string') data[option]()
})
}
$.fn.typeahead.defaults = {
source: []
, items: 8
, menu: '<ul class="typeahead dropdown-menu"></ul>'
, item: '<li><a href="#"></a></li>'
, onselect: null
, property: 'value'
}
$.fn.typeahead.Constructor = Typeahead
/* TYPEAHEAD DATA-API
* ================== */
$(function () {
$('body').on('focus.typeahead.data-api', '[data-provide="typeahead"]', function (e) {
var $this = $(this)
if ($this.data('typeahead')) return
e.preventDefault()
$this.typeahead($this.data())
})
})
}( window.jQuery );
/* =============================================================
* bootstrap-typeahead.js v2.0.0
* http://twitter.github.com/bootstrap/javascript.html#typeahead
* =============================================================
* Copyright 2012 Twitter, Inc.
@@ -29,6 +29,8 @@
this.highlighter = this.options.highlighter || this.highlighter
this.$menu = $(this.options.menu).appendTo('body')
this.source = this.options.source
+ this.onselect = this.options.onselect
+ this.strings = true
this.shown = false
this.listen()
}
@@ -38,8 +40,17 @@
constructor: Typeahead
, select: function () {
- var val = this.$menu.find('.active').attr('data-value')
- this.$element.val(val)
+ var val = JSON.parse(this.$menu.find('.active').attr('data-value'))
+ , text
+
+ if (!this.strings) text = val[this.options.property]
+ else text = val
+
+ this.$element.val(text)
+
+ if (typeof this.onselect == "function")
+ this.onselect(val)
+
return this.hide()
}
@@ -68,6 +79,25 @@
var that = this
, items
, q
+ , value
+
+ this.query = this.$element.val()
+
+ if (typeof this.source == "function")
+ value = this.source(this, this.query)
+ if (value)
+ this.process(value)
+ else
+ this.process(this.source)
+ }
+
+ , process: function (results) {
+ var that = this
+ , items
+ , q
+
+ if (results.length && typeof results[0] != "string")
+ this.strings = false
this.query = this.$element.val()
@@ -75,7 +105,9 @@
return this.shown ? this.hide() : this
}
- items = $.grep(this.source, function (item) {
+ items = $.grep(results, function (item) {
+ if (!that.strings)
+ item = item[that.options.property]
if (that.matcher(item)) return item
})
@@ -97,10 +129,14 @@
, caseSensitive = []
, caseInsensitive = []
, item
+ , sortby
while (item = items.shift()) {
- if (!item.toLowerCase().indexOf(this.query.toLowerCase())) beginswith.push(item)
- else if (~item.indexOf(this.query)) caseSensitive.push(item)
+ if (this.strings) sortby = item
+ else sortby = item[this.options.property]
+
+ if (!sortby.toLowerCase().indexOf(this.query.toLowerCase())) beginswith.push(item)
+ else if (~sortby.indexOf(this.query)) caseSensitive.push(item)
else caseInsensitive.push(item)
}
@@ -117,7 +153,9 @@
var that = this
items = $(items).map(function (i, item) {
- i = $(that.options.item).attr('data-value', item)
+ i = $(that.options.item).attr('data-value', JSON.stringify(item))
+ if (!that.strings)
+ item = item[that.options.property]
i.find('a').html(that.highlighter(item))
return i[0]
})
@@ -251,6 +289,8 @@
, items: 8
, menu: '<ul class="typeahead dropdown-menu"></ul>'
, item: '<li><a href="#"></a></li>'
+ , onselect: null
+ , property: 'value'
}
$.fn.typeahead.Constructor = Typeahead
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