Create an autocomplete list with the datalist element

The HTML 5 `datalist` element comes in handly when you want to create an autocomplete input from a pre-defined list.

The element generates a dropdown that allow user to choose its options. In comparison to the normal `select` element, the `datalist` element provide the ability of filter the options.

Users also can enter what they want in the same way the normal text box does.

<input list="demo__list" />
<datalist id="demo__list">
    <option value="..." />
    <option value="..." />
    <option value="..." />
    ...
</datalist>