Marc Weber wrote:
I still don't get it.
Who is going to add style attributes causing injections?

The user (client side): can do so anyway by using javascript: urls in the 
browser
window or firebug lite like tools

The programmer? The programmer can do whatever he/she wants anyway.
In which way is it different from the programmer using eval in an unsafe
way?

It's just like using eval() in an unsafe way, but Ur/Web rules out eval()! An invariant of Ur/Web is that strings are never interpreted as programs and executed, unless your program contains an explicit interpreter.

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