I was told today that it’s possible to invoke a function without parentheses. The only ways I could think of was using functions like apply or call.

f.apply(this);
f.call(this);

But these require parentheses on apply and call leaving us at square one. I also considered the idea of passing the function to some sort of event handler such as setTimeout:

setTimeout(f, 500);

But then the question becomes “how do you invoke setTimeout without parentheses?”

So what’s the solution to this riddle? How can you invoke a function in Javascript without using parentheses?

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