Checking if Javascript .split() fails

Question

I have the following function:

var checkCode=function(codeString){
  var ifs=codeString.split("if");
  ...
}

Is there a way to check if the code fails, as in does not find any if strings to split from in the codeString that is input to the function?

Answer 1

If the length of the result is 1, then the split didn't split.