Sebastian,

I got your mail but don't have a github userid.

WRT your question, the only solution is the loop as the version of javascript in pronto does not support Object.assign() which would copy properties IIRC, from another object.

var btn = GUI.addButton();
for (var key in properties) {
btn[key] = properties[key];
}


Note that doing color via a property on a button will only work until said button is pressed onscreen. I think you have to call setColor() or setBgColor() on a button.

However, using color and bgColor for panels works just as you would expect.

Another tidbit - The 'transparent' property if used on a panel is like 'no Fill' from the editor. However, if you set a button's 'transparent' property to true, the button cannot be pressed. I often use this undocumented 'feature' to enable/disable buttons without having to hide them.