The autocomplete functionality shows the suggestion list according to the entered value. The user can select a value from the list.
With jQuery UI you can easily add autocomplete widget on the input element. Navigate to the suggestion list either by mouse or keyboard arrow keys.
It has the various options that allow us to customize the widget.
You can fix the suggestion source value while initializing in this case whenever the user typed any character then it searches the value within the given source value or you can make it dynamic with AJAX.
In the demonstration, I am implementing this on an element which shows the user’s name list according to the entered value with AJAX.