Question

I have this RegExp

this.value = this.value.replace(/(^((?!(\n|[0-9])).)*$)/mg,'');

That replaces everything except digits and new lines.
    The problem is that if I have a string like this: word_and_numbers123123123 the RegExp doesn’t replace the letters.

Every thing

/(^((?!(HERE)).)*$)/

is, as far as i am concerned, NOT removed.

Im simply using \n|[0-9]
Where “HERE” is, so, full RegExp:

/(^((?!(\n|[0-9])).)*$)/

But the problem, is once again, that it, the RegExp, doesn’t remove %$word in for example this string: %$word_2143234

Answer 1

Maybe I have misunderstood. Why not simply do the replace without the negative look ahead?

this should replace

everything except digits and new lines.

this.value = this.value.replace(/([^\r\n\d]+)/g,'');