Extract URLs from objects

obj2url.js

const obj = require("./data.json");

function getUrl(obj) {
  const ary = [];
  helper(obj, ary);
  return ary;
}

function helper(item, ary) {
  if (typeof item === "string" && isUrl(item)) {
    ary.push(item);
    return;
  } else if (typeof item === "object") {
    for (const k in item) {
      helper(item[k], ary);
    }
    return;
  }

  return null;
}

function isUrl(str) {
  if (typeof str !== "string") return false;
  return /http|https/.test(str);
}

const urls = getUrl(obj);

console.log(JSON.stringify(urls, " ", "\n"));