[Untalented]

Here is the code.. When I refresh the page and tried entering new data that i want to save, it overwrites the previous stored data

let form = document.getElementById('form');
let user = [];

form.addEventListener('submit', function (e) {
  e.preventDefault();
  let name = document.getElementById('name').value;
  let pw = document.getElementById('pw').value;

  let save = {
    "name": name,
    "pw" : pw
  }

  user.push(save);
  localStorage.setItem("user-list-test", JSON.stringify(user));

})

[ArtificialSoldier]

You're always initializing user to be an empty array. You should only do that if there's nothing in localStorage, or else set it from that value.