No. It was an answer. The correct answer is that there are many ways to test for this. Just look for one.

If you knew the answer, you would've already answered this. Instead, you keep giving non-answers until you admit that you don't test yourself, and that other people use some libraries, you don't know which.

I did - with two specific answers. Then I went and asked a security tester and told you the results of that question.

You can keep using all the words and comments that you want, but the simple truth is that this is a solved problem, I gave you two solutions, and yet you keep using ad hominem attacks.

As you yourself wrote, "Ignorance is bliss". Those are your words, not mine.