JS: Forbidding things

[Steffan153]

For just disabling a function, and it has already been undefined, things to handle:

https://www.codewars.com/kata/reviews/5e8ad9356ea54400012d2d11/groups/5e8efc4c45ab07000144ec39
https://www.codewars.com/kata/reviews/5e8ad9356ea54400012d2d11/groups/5e8efc0edf15f9000118d18c

vm, require, module.require, process.mainModule.require.

@error256 might be able to come up with more?

As far as disabling a specific string, that's really meh... TODO

[hobovsky]

Maybe some note on Object.freeze used to prevent tampering with built-in things would be useful?

[XRFXLP]

As far as disabling a specific string, that's really meh

Actually, I have found that disabling string intelligently is quite effective and easy method to forbid things, since in JavaScript there are very few method to use string as a code, all one need to do is to forbid them and then forbid the relevant keyword.

I think one can easily enforce first solution by mere disabling require(which by itself disables whole lot of things).

[Steffan153]

Okay, when disabling a string: require, module.require, vm, process.binding (undefining will make Node not work, only disable contextify as the arguemnt),eval, ...

[XRFXLP]

There is actually a better way to disable eval: delete it from the from global.

By doing that you would get rid of function constructor and JSFuck stuffs(which obviously won't be disabled by disabling strings).