Modern alert, confirm and prompt dialog implementation
Description
This package replaces default alert and confirm dialogs from Dart's Window class and adds missing prompt dialog. Default system dialogs called by that prompts are superseded by modern modal design.
Usage
Usage is almost the same as set in the Dart's Window class and completely the same as described in the WHATWG HTML Standard. For each dialog there is just one file to import only the dialog you really need. There is also one file to import all three dialogs at once if you want to use them all.