PTT ask/over18 set cookie in JS

ptt.ask18.js

document.querySelector('button[name="yes"]').addEventListener('click', e => {
  e.preventDefault();
  document.cookie = 'over18=1; path=/';
  location = document.querySelector('input[name="from"]').value;  
}, false);

document.querySelector('button[name="no"]').addEventListener('click', e => {
  e.preventDefault();
  location = '/';  
}, false);