options.js

function save_options() {
  const refreshInterval = document.getElementById("refresh-interval").value;

  chrome.storage.sync.set({ refreshInterval: refreshInterval }, function () {
    const status = document.getElementById("status");
    status.textContent = "Options saved.";
    setTimeout(function () {
      status.textContent = "";
    }, 750);
  });
}

function restore_options() {
  chrome.storage.sync.get({ refreshInterval: 30 }, function (data) {
    document.getElementById("refresh-interval").value = data.refreshInterval;
  });
}

document.addEventListener("DOMContentLoaded", restore_options);
document.getElementById("save").addEventListener("click", save_options);