chromium-proxy-settings/options.ts

function setProxy() {
  let active = (document.getElementById("proxyActive") as HTMLInputElement).checked;
  const host = (document.getElementById("proxyHost") as HTMLInputElement).value;
  const port = (document.getElementById("proxyPort") as HTMLInputElement).value;
  const bypass = (document.getElementById("proxyBypass") as HTMLInputElement).value;
  if (!host || !port) {
    active = false;
    (document.getElementById("proxyActive") as HTMLInputElement).checked = false;
  }
  chrome.storage.local.set({ active: active, host: host, port: Number(port), bypass: bypass.split("\n") });
}
window.addEventListener("DOMContentLoaded", async () => {
  (document.getElementById("proxySettings") as HTMLInputElement).addEventListener("submit", setProxy);
  const { active, host, port, bypass } = await chrome.storage.local.get(["active", "host", "port", "bypass"]);
  if (active) {
    (document.getElementById("proxyActive") as HTMLInputElement).checked = active;
  }
  if (host) {
    (document.getElementById("proxyHost") as HTMLInputElement).value = host;
  }
  if (port) {
    (document.getElementById("proxyPort") as HTMLInputElement).value = port;
  }
  if (bypass) {
    (document.getElementById("proxyBypass") as HTMLInputElement).value = bypass.join("\n");
  }
});