Don’t tell me what my browser can’t do! by Christian Heilmann
A great piece by Christian on taking a responsible, customer-focused approach to building on the web.
You don’t have to support old browsers and terrible setups. But you are not allowed to block them out. It is a simple matter of giving a usable interface to end users. A button that does nothing when you click it is not a good experience. Test if the functionality is available, then create or show the button.
Yes, this is an argument for progressive enhancement. No, that does not mean you can’t use JavaScript.
You can absolutely expect JavaScript to be available on your end users computers in 2016. At the same time it is painfully naive to expect it to work under all circumstances.