javascript
const regex = /<\/?[a-zA-Z][a-zA-Z0-9]*(?:\s[^>]*)?>\g;
const result = str.match(regex);
python
import re
pattern = re.compile(r'<\/?[a-zA-Z][a-zA-Z0-9]*(?:\s[^>]*)?>')
result = pattern.findall(text)
go
import "regexp"
re := regexp.MustCompile(`<\/?[a-zA-Z][a-zA-Z0-9]*(?:\s[^>]*)?>`)
result := re.FindAllString(text, -1)