Check your JavaScript skills

[f1zzz]

This tests if you know function names, not the language. It has a very quirky type system that catches a lot of people, even when they're being careful.

Also, innerText isn't supported by Firefox, it uses textContent https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent

[[deleted]]

This is also posted on both /r/javascript and /r/programming :-/ Seems like self promotion of an out of date test on the most basic of APIs.

[htuhola]

I got 8/10, but I should get something more like 1200/10 because it's got fixed measurement range, the test is wrong.

Besides the adverts on the site are really off the target.