The autocomplete functionality shows the suggestion list according to the entered value. You can choose a suggestion from the list. With jQuery UI you can easily add autocomplete widget to the input element. You can use your mouse or keyboard arrow keys to navigate the suggestion list. The widget has various options for customization.
You can set the suggestion source value while initializing the widget. This means it will search for values within the given source value whenever the user types any character. Alternatively, you can make it dynamic with AJAX.
In this tutorial, I show how you can add jQuery UI autocomplete on the textbox and select single or multiple values from the suggestion list.
