I often come across Number Code Inputs on various websites used for security measures, voucher codes and more. These Number Code Inputs often have a bit more functionality behind them then you might think at first. Let's create our own as an exercise.
The backdrop-filter property is one of the most useful new, at the time of writing, CSS properties that are landing in major browsers. It will allow you to set a custom backdrop-filter on a div. This is not to be mistaken for the CSS filter property.