Remove unwanted part of String. Regex / JS

Question

If I have a string which looks like this:

var myString = '73gf9y::-8auhTHIS_IS_WHAT_I_WANT'

What regex would I need to end up with:

'THIS_IS_WHAT_I_WANT'

The first part of my String will always be a random assortment of characters. Is there some regex which will remove everything up to THIS?

Answer 1

So you want to strip out everything from beginning to the first uppercase letter?

console.log(myString.replace(/^[^A-Z]+/,""));

THIS_IS_WHAT_I_WANT

See fiddle, well I'm not sure if that is what you want :)

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To strip out everything from start to the first occuring uppercase string, that's followed by _ try:

myString.replace(/^.*?(?=[A-Z]+_)/,"");

This uses a lookahead. See Test at regex101;