hint: Your browser the native datalist element.
<option value="option 1"> <option>option 2</option> <!-- With an output similar to how Google Chrome displays the suggestion: displaying both the label as even also the value, that would get inserted into the form field --> <option value="option value 3">option label 3</option> <!-- With an output as the other browsers would display the suggestion: displaying the label, but inserting the value --> <option value="option value 4" label="option label 4">
thank you @aFarkas for your great overview: https://github.com/h5bp/html5please/issues/18