Regex – Conditional based on first part of text

Is it possible to make a conditional that does not check part of the string when is not needed?

For example:

Regex:
^[a-zA-Z]+.*#[0-9]+$

Example text:
feature: My name is Oliver #9123

I would like to when the text being:

release: My name is oliver

The same Regex matches both cases not requiring the #9123 for the release prefix, is that possible?

I have tried to use some regex conditionals that I found on google, but didn’t have success.

>Solution :

You could try a logical OR (|) in the regexp:

const tests=["My name is Oliver #9123",
             "release: My name is oliver",
             "this should fail",
             "#12345 another fail"];

tests.forEach(str=>
  console.log(str+" - "+(str.match(/^release|[a-zA-Z]+.*#[0-9]+/)?"pass":"fail"))
)