Why does string to number comparison work in Javascript

Question

I am trying to compare a value coming from a HTML text field with integers. And it works as expected. Condition is -

x >= 1 && x <= 999;
         


        

Answer 1

The MDN's docs on Comparision states that the operands are converted to a common type before comparing (with the operator you're using):

The more commonly used abstract comparison (e.g. ==) converts the operands to the same Type before making the comparison. For relational abstract comparisons (e.g., <=), the operands are first converted to primitives, then to the same type, before comparison.

You'd only need to apply parseInt() if you were using a strict comparision, that does not perform the auto casting before comparing.