nowadays it feels more like a 7kyu, if not an 8

• Node 12 should be enabled (Refer this and this for more info)

Description should state the words search has to be case insensitive, and make clear we should consider positive cases like 'half-halfling'. Actually there's no need to check for words, but just string inclusion. If it's intended, it must be in the description, if it is not... see Blind4Basics just below...

needs random tests and just more tests, too...

Not 3000, but 3999. Higher numbers are not specified. Also, the description says:

Remember that there can't be more than 3 identical symbols in a row.

How would you write 4000?!

This only supports numbers up to 3000

Note that x == o already returns a boolean expression, you don't need an if statement to explicitly return true or false

Thanks for the nice kata!!!

I think it would be a good idea to add two more test-cases to the default ones. Namely the Cheshire cat and the one where 'shire' is surrounded by non-alphabetical characters.

ok

I think the TLDR explains that pretty well. It says that the keywords may be found anywhere within either of the fields

I'll have a look and approve

JS translation kumited.

How to approve it ?

I think it would be nice to mention in the instructions that there might be mixed case words.

Ah thank you, good catch. Making the changes now.