Initialize the autocomplete with the appendTo option specified:

Initialize the autocomplete with the autoFocus option specified:

Specify additional classes to add to the widget's elements. Any of classes specified in the Theming section can be used as keys to override their value. To learn more about this option, check out the learn article about the classes option .

Independent of the variant you use, the label is always treated as text. If you want the label to be treated as html you can use Scott González' html extension . The demos all focus on different variations of the source option - look for one that matches your use case, and check out the code.

Array : An array can be used for local data. There are two supported formats:
• An array of strings: [ "Choice1", "Choice2" ]
• An array of objects with label and value properties: [ { label: "Choice1", value: "value1" }, ... ] The label property is displayed in the suggestion menu. The value will be inserted into the input element when a user selects an item. If just one property is specified, it will be used for both, e.g., if you provide only value properties, the value will also be used as the label. String : When a string is used, the Autocomplete plugin expects that string to point to a URL resource that will return JSON data. It can be on the same host or on a different one (must support CORS). The Autocomplete plugin does not filter the results, instead a query string is added with a term field, which the server-side script should use for filtering the results. For example, if the source option is set to "https://example.com" and the user types foo , a GET request would be made to https://example.com?term=foo . The data itself can be in the same format as the local data described above.
Function : The third variation, a callback, provides the most flexibility and can be used to connect any data source to Autocomplete, including JSONP. The callback gets two arguments:
• A request object, with a single term property, which refers to the value currently in the text input. For example, if the user enters "new yo" in a city field, the Autocomplete term will equal "new yo" .
• A response callback, which expects a single argument: the data to suggest to the user. This data should be filtered based on the provided term, and can be in any of the formats described above for simple local data. It's important when providing a custom source callback to handle errors during the request. You must always call the response callback even if you encounter an error. This ensures that the widget always has the correct state.

When filtering data locally, you can make use of the built-in $.ui.autocomplete.escapeRegex function. It'll take a single string argument and escape all regex characters, making the result safe to pass to new RegExp() .

Code examples:

Initialize the autocomplete with the source option specified:

close() Returns: jQuery ( plugin only )

Closes the Autocomplete menu. Useful in combination with the search method, to close the open menu.

• This method does not accept any arguments.

Code examples:

Invoke the close method:

Removes the autocomplete functionality completely. This will return the element back to its pre-init state.

• This method does not accept any arguments.

Code examples:

Invoke the destroy method:

Retrieves the autocomplete's instance object. If the element does not have an associated instance, undefined is returned.

Unlike other widget methods, instance() is safe to call on any element after the autocomplete plugin has loaded.

• This method does not accept any arguments.

Code examples:

Invoke the instance method:

Gets the value currently associated with the specified optionName .

Note: For options that have objects as their value, you can get the value of a specific key by using dot notation. For example, "foo.bar" would get the value of the bar property on the foo option.

optionName

Type: String

The name of the option to get.

Code examples:

Invoke the method:

option() Returns: PlainObject

Gets an object containing key/value pairs representing the current autocomplete options hash.

• This signature does not accept any arguments.

Code examples:

Invoke the method:

option( options ) Returns: jQuery ( plugin only )

Sets one or more options for the autocomplete.

options

Type: Object

A map of option-value pairs to set.

Code examples:

Invoke the method:

search( [value ] ) Returns: jQuery ( plugin only )

Triggers a search event and invokes the data source if the event is not canceled. Can be used by a selectbox-like button to open the suggestions when clicked. When invoked with no parameters, the current input's value is used. Can be called with an empty string and minLength: 0 to display all items.

value

Type: String

widget() Returns: jQuery

Returns a jQuery object containing the menu element. Although the menu items are constantly created and destroyed, the menu element itself is created during initialization and is constantly reused.

• This method does not accept any arguments.

Code examples:

Invoke the widget method:

The autocomplete widget is built with the widget factory and can be extended. When extending widgets, you have the ability to override or add to the behavior of existing methods. The following methods are provided as extension points with the same API stability as the plugin methods listed above. For more information on widget extensions, see Extending Widgets with the Widget Factory .

_renderItem( ul, item ) Returns: jQuery

Method that controls the creation of each option in the widget's menu. The method must create a new <li> element, append it to the menu, and return it. See the Menu documentation for more details about the markup.

Type: jQuery

The <ul> element that the newly created <li> element must be appended to.

Type: Object

_resizeMenu() Returns: jQuery ( plugin only )

Method responsible for sizing the menu before it is displayed. The menu element is available at this.menu.element .

• This method does not accept any arguments.

Code examples:

Always display the menu as 500 pixels wide.

change( event, ui ) Type: autocompletechange

Triggered when the field is blurred, if the value has changed.

event

Type: Event

close( event, ui ) Type: autocompleteclose

Triggered when the menu is hidden. Not every close event will be accompanied by a change event.

event

Type: Event Triggered when focus is moved to an item (not selecting). The default action is to replace the text field's value with the value of the focused item, though only if the event was triggered by a keyboard interaction.

Canceling this event prevents the value from being updated, but does not prevent the menu item from being focused.

event

Type: Event

open( event, ui ) Type: autocompleteopen

Triggered when the suggestion menu is opened or updated.

event

Type: Event

response( event, ui ) Type: autocompleteresponse

Triggered after a search completes, before the menu is shown. Useful for local manipulation of suggestion data, where a custom source option callback is not required. This event is always triggered when a search completes, even if the menu will not be shown because there are no results or the Autocomplete is disabled.

event

Type: Event

search( event, ui ) Type: autocompletesearch

Triggered before a search is performed, after minLength and delay are met. If canceled, then no request will be started and no items suggested.

event

Type: Event Triggered when an item is selected from the menu. The default action is to replace the text field's value with the value of the selected item.

Canceling this event prevents the value from being updated, but does not prevent the menu from closing.

event

Type: Event

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>autocomplete demo</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/smoothness/jquery-ui.css">
  <script src="//code.jquery.com/jquery-1.12.4.js"></script>
  <script src="//code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
</head>
<body>
 
<label for="autocomplete">Select a programming language: </label>
<input id="autocomplete">
 
<script>
$( "#autocomplete" ).autocomplete({
  source: [ "c++", "java", "php", "coldfusion", "javascript", "asp", "ruby" ]
});
</script>
 
</body>
</html>

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>autocomplete demo</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/smoothness/jquery-ui.css">
  <script src="//code.jquery.com/jquery-1.12.4.js"></script>
  <script src="//code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
</head>
<body>
 
<label for="autocomplete">Select a programming language: </label>
<input id="autocomplete">
 
<script>
var tags = [ "c++", "java", "php", "coldfusion", "javascript", "asp", "ruby" ];
$( "#autocomplete" ).autocomplete({
  source: function( request, response ) {
          var matcher = new RegExp( "^" + $.ui.autocomplete.escapeRegex( request.term ), "i" );
          response( $.grep( tags, function( item ){
              return matcher.test( item );
          }) );
      }
});
</script>
 
</body>
</html>

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