How does HackThis!! Reverse console output?

? [stefanking56]
9 years ago

0

While testing some code for the coding levels, I noticed that the output is reversed.This seems like a funny easter egg. Could someone explain how this is done?

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dloser
9 years ago

0

Can you give a specific example? Works just fine over here…

Richard Brook [RichardBrook]
9 years ago

0

yeah same here, example @dloser , in crypt9’s page console
console.log("abcd")
returns dcba

A beginner practices until he gets it right, a professional practices until he can’t get it wrong!

dloser
9 years ago

0

Ah.. that specific function. Well.. it does that everywhere on HackThis!! and it shouldn’t be too hard to find out why.. ;)

_TRYER_
9 years ago

0

you made me curious… why this happen?

singleton
9 years ago | edited 9 years ago

1

Nice, I haven’t noticed this before.
In order to find out why the returned string is reversed you need to do the following:

In the console, type alert(console.log) or better yet console.log(console.log.toString().split('').reverse().join('')) to see the function definition.
Apparently it was overridden by a custom one which reverses the output before actually calling the original console.log)

I have no idea why it was done, probably to mess with us during javascript levels or something.

Edit: A search for the function in the site’s code on GitHub reveals the reason in the commit message. Git blame FTW!

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