Help with regex in javascript

I have this sample text, which is retrieved from the class name on an html element: rich-message err-test1 erroractive rich-message err-test2 erroractive rich-message erroractive err-test1 err-test2 rich-message erroractive I am trying to match the "test1"/"test2" data in each of these examples. I am currently using the following regex, which matches the "err-test1" type of word. I can't figure out how to limit it to just the data after the hyphen(-). /err-(\S*)/ig Head hurts from banging against this wall.

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