<datalist> tag is similar to the dropdown menu of <select> tag. However one difference is it lets user type into and filter options from from the dropdown menu.
<form>
<label for="city">Ideal city to visit?</label>
<input type="text" list="cities" id="city" name="city">
<datalist id="cities">
<option value="New York City"></option>
<option value="Tokyo"></option>
<option value="Barcelona"></option>
<option value="Mexico City"></option>
<option value="Melbourne"></option>
<option value="Other"></option>
</datalist>
</form>The above render like this: