Regex to check whether string starts with, ignoring case differences

Question

I need to check whether a word starts with a particular substring ignoring the case differences. I have been doing this check using the following regex search pattern but th

Answer 1

I think all the previous answers are correct. Here is another example similar to SERPRO's, but the difference is that there is no new constructor:

Notice: i ignores the case and ^ means "starts with".

 var whateverString = "My test String";
 var pattern = /^my/i;
 var result = pattern.test(whateverString);
 if (result === true) {
     console.log(pattern, "pattern matched!");
 } else {
     console.log(pattern, "pattern did NOT match!");
 }

Here is the jsfiddle (old version) if you would like to give it a try.