Working with modal dialogs in Brackets extensions

main.js

define(function (require) {
    "use strict";

    var AppInit = brackets.getModule("utils/AppInit");
    var DefaultDialogs = brackets.getModule("widgets/DefaultDialogs");
    var Dialogs = brackets.getModule("widgets/Dialogs");

    AppInit.appReady(function _onAppReady() {
        var myDialog = Dialogs.showModalDialog(
            DefaultDialogs.DIALOG_ID_INFO,
            "My Dialog Title",
            "My dialog text.",
            [
                {
                    className: Dialogs.DIALOG_BTN_CLASS_NORMAL,
                    id: "cancel",
                    text: "Cancel"
                },
                {
                    className: Dialogs.DIALOG_BTN_CLASS_PRIMARY,
                    id: "save-as",
                    text: "Save as…"
                }
            ]
        );

        myDialog.getPromise().then(function (buttonId) {
            if (buttonId === "save-as") {
                alert("Saving as");
            }
        });
    });
});