Prevent Infinite Loops with a Valid Terminal Condition

JavaScript
1

On my mac both causing error when changing comparison operator

Safari

null is not an object (evaluating 'code.match(/i\s*?<=\s*?4;/g).length')

Chrome

Cannot read property 'length' of null
2

string.match(regexp) returns null in case of no match.

So, whatever you wrote has a chance of becoming null.length, which is no no.

I don’t really know what your code is from what is shown; please, post the whole code for a better diagnosis.

3

I don’t use any regex at all, only the >= operator so this is a bug

4

Then, maybe whatever code parsing logic in those browsers might be functioning weird. Why don’t you post the full code? or more code to understand the context? Or full stack trace?

5

code.match(/i\s*?<=\s*?4;/g).length means the regex is looking for <= in between i and 4.