Understand using instance of method

First I hope I am posting this correctly on here. I passed this challenge. But then realized it says it’s “generally better to use the instanceof method to check the type of an object” I then after passing looked at the answer in Get Hint. Also watched how others passed it on youtube. Nobody used the instanceof method. So I have been trying to figure out how to use instance of. Now I am super confused. Can anyone show me how it would be completed using (instanceof)
Thank you.

Your code so far

function Dog(name) {
  this.name = name;

// Add your code below this line
function joinDogFraternity(candidate) {
  if( candidate.constructor === Dog){
    return true;
  return false;

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.90 Safari/537.36.

Link to the challenge:

This challenge explicitly tells you to use the constructor property, so in order to pass the challenge you need to use candidate.constructor. In real life you would want to use instanceof, which is what the note is trying to communicate.

Thank you, I know one of my biggest faults is not paying enough attention to instruction. I am working on that as well, Trying to be more focus.
Thank you very much.