get all classes and ids used by element

allclasses.js

var classes = []

$('div').each(function() {
  if (this.hasAttribute('class')) {
    classes = classes.concat( $(this).attr("class").split(/\s+/) );
  }
});

classes = [...new Set(classes)];

var classString;

for (const c of classes) {
  classString += '.'+c+',\n';
}
console.log(classString);

var ids  = []

$('div').each(function() {
  if (this.hasAttribute('id')) {
    ids = ids.concat( $(this).attr("id").split(/\s+/) );
  }
});

ids = [...new Set(ids)];

var idString;

for (const c of ids) {
  idString += '#'+c+',\n';
}
console.log(idString);