Javascript equality triple equals but what about greater than and less than?

Question

I was explaining to a colleague that you should use === and !== (and >== and <== of course) when comparing variables in

Answer 1

12 > '100' // false
'12' > 100 // false
'12' > '100' // true

As others mentioned, if one is a number the other is casted to a number. Same rule applies to these cases as well:

null > 0 // false
null < 0 // false
null >= 0 // true

However, there might be cases that you would need null >= 0 to give false (or any of the number string comparison cases above), therefore it is indeed a need to have strict comparison >== or <==.

For example, I am writing a compareFunction for the Array.prototype.sort() and an expression like x>=0 would treat null values like 0's and put them together, whereas I want to put them elsewhere. I have to write extra logic for those cases.

Javascript says deal with it on your own (in practice).