Find Intersection

findIntersection.js

function findIntersection(strArr) {
  let result = [];
  if (Array.isArray(strArr)) {
    let arg1 = strArr[0].split(",").map(elem => elem.trim());
    let arg2 = strArr[1].split(",").map(elem => elem.trim());
    arg1.filter(a => {
      if (arg2.includes(a)) {
        result.push(a.trim());
      }
    });
  }
  if (result.length > 0) {
    return result.join(",");
  } else {
    return false;
  }
}