URL Slug

const re = new RegExp("^[a-z0-9]+(?:-[a-z0-9]+)*$", "");
const input = "my-blog-post";
const match = input.match(re);
console.log(match ? match[0] : null);

import re

pattern = re.compile(r"^[a-z0-9]+(?:-[a-z0-9]+)*$")
input_text = "my-blog-post"
for m in pattern.finditer(input_text):
    print(m.group(0))

package main

import (
	"fmt"
	"regexp"
)

func main() {
	re := regexp.MustCompile(`^[a-z0-9]+(?:-[a-z0-9]+)*$`)
	input := `my-blog-post`
	for _, match := range re.FindAllString(input, -1) {
		fmt.Println(match)
	}
}