Read bootstrap 4 autocomplete dropdown for more information.
Features
- Fast.
- Easy. No complex configuration. HTML attributes supported.
- Modals supported. No problems in modals.
- Customizable. You can customize every single step in the suggesting workflow.
- Batteries included. It works out of the box for Bootstrap v3 and v4.
- i18n. Use data-* attributes to specify the strings to use in case of errors/noresults.
- Styles. No custom styles. Uses standard Bootstrap’s dropdown.
Build a search with autocomplete without any coding
Getting Started
Bootstrap Autocomplete works as a plugin. Add it to your page
<script src="bootstrap-autocomplete.min.js"></script>
Using CDN (thanks to JSDelivr)
<script src="https://cdn.jsdelivr.net/gh/xcash/bootstrap-autocomplete@v2.3.0/dist/latest/bootstrap-autocomplete.min.js"></script>
<script src="https://cdn.jsdelivr.net/gh/xcash/bootstrap-autocomplete@master/dist/latest/bootstrap-autocomplete.min.js"></script>
That’s it! Go on to enhance your text fields! 🙂
Basic usage
Text Autocomplete
Autocomplete is not enabled by default. You must activate it in the fields you want to enhance. Of course, you can also use a wide selector to enable it on specific classes or tags.
Suppose you have a field as follows
<input class="form-control basicAutoComplete" type="text" autocomplete="off">
Here the class basicAutoComplete is used to identify all the fields on which to activate a basic autocomplete. Then in Javascript we activate it.
$('.basicAutoComplete').autoComplete({
resolverSettings: {
url: 'testdata/test-list.json'
}
});In this example, we specified the URL to use. Autocomplete will automatically make an Ajax GET request to that URL using an argument named q with the text typed by the user. Rate limits are enforced and the minimum field length is 2.
Even simpler you can pass the URL directly in the markup
<input class="form-control basicAutoComplete" type="text"
data-url="myurl"
autocomplete="off">and enhance it just with
$('.basicAutoComplete').autoComplete();Response Format
We know how to start an autocomplete lookup but what about the results?
The default configuration expects a simple list in JSON format. Like
[
"Google Cloud Platform",
"Amazon AWS",
"Docker",
"Digital Ocean"
]Select Autocomplete
One of the main features of Bootstrap Autocomplete is to enhance <select> fields as easy as <input> text fields. Selects are useful to restrict choices to a set of possibilities.
Enhancing a select is no different than text fields.
<select class="form-control basicAutoSelect" name="simple_select"
placeholder="type to search..."
data-url="testdata/test-select-simple.json" autocomplete="off"></select>$('.basicAutoSelect').autoComplete();Nice! 🙂
Response Format for Select
In this case, we need two values in the response: id and a text.
[
{ "value": 1, "text": "Google Cloud Platform" },
{ "value": 2, "text": "Amazon AWS" },
{ "value": 3, "text": "Docker" },
{ "value": 4, "text": "Digital Ocean" }
]Events
Bootstrap Autocomplete triggers usual events.
change – Value changed
And custom.
autocomplete.select – (evt, item) The element item is the item selected by the user and currently selected in the field.
autocomplete.freevalue – (evt, value) The text field contains value as the custom value (i.e. not selected from the choices dropdown).
Reference
Activating Autocomplete
Configuration options
autoSelect- Default:
true. Automatically selects selected item on blur event (i.e. using TAB to switch to next field).
events- Object to specify custom event callbacks.
searchPostfunc(resultsFromServer, origJQElement)- Function called to manipulate server response. Bootstrap Autocomplete needs a list of items. Use this function to convert any server response in a list of items without reimplementing the default AJAX server lookup.
Arguments:
- resultsFromServer – Result received from the server. Using the default resolver this is an object.
- origJQElement (JQuery) – Original jQuery element.
Returns:
List of items.
Following events are available to fine tune every lookup aspect. Rarely used in common scenarios
typedfunc(newValue, origJQElement)- Field value changed. Use this function to change the searched value (like prefixing it with some string, filter some characters, …). Or to stop lookup for certain values.Arguments:
- newValue (string) – New value.
- origJQElement (JQuery) – Original jQuery element.
Returns:
(Un)modified value or
falseto stop the execution.
searchPrefunc(newValue, origJQElement)- Before starting the search. Like in the
typedevent, this function can change the search value. The difference is this event is called after minLength checks.Arguments:- newValue (string) – New value.
- origJQElement (JQuery) – Original jQuery element.
Returns:
(Un)modified value or
falseto stop the execution.
As a reference the lookup workflow calls events in the following order:
typed -> searchPre -> search -> searchPost
Advanced usage
Set custom value
To set an initial or change the value of the field.
$('.myAutoSelect').autoComplete('set', { value: myValue, text: myText });
Customize results using default AJAX resolver
Using the searchPost the event you can manipulate the result set making it compatible with autocomplete default. This is useful to bypass the customization of the entire search AJAX call.
$('.myAutoSelect').autoComplete({
events: {
searchPost: function (resultFromServer) {
return resultFromServer.results;
}
}
});
Translating messages
To customize “no results” message use the following markup.
<select class="form-control emptyAutoSelect" name="empty_select"
data-url="testdata/test-empty.json"
data-noresults-text="Nothing to see here."
autocomplete="off"></select>