kebabize-string.js

const kebabize = val => {
  return val
    .replace(/([a-z])([A-Z])/g, "$1-$2")
    .replace(/\s+/g, "-")
    .replace(/_{1,}/g, "-")
    .toLowerCase();
};

const src = [
  "hocusPocus",
  "HocusPocus",
  "hocus_Pocus",
  "hocus-pocus",
  "hocus Pocus"
];

const dst = src.map((x, i) => kebabize(x));

for (let i = 0; i < src.length; i++) {
  console.log(`${src[i]} ---> ${dst[i]}`);
}