I\'d like to have a Listbox or similar, where the user could start typing, and the Listbox would narrow down the choices depending on what has already been typed, and autocomple
[Edit] HtmlService is faster and more advanced. UiApp works, but is slow because of the network.
The HtmlService solution here Populate jQuery autocomplete list using value array from Google Spreadsheet is much better.
A UiApp version: https://sites.google.com/site/scriptsexamples/learn-by-example/uiapp-examples-code-snippets/suggest-box
Or this way that I built:
To see it in action, type an airport name into: http://www.treesforlife.org.au/carbon-calculator
But this was is done with spreadsheet formulas, not google-apps-script. see http://www.cellmaster.com.au