felt/static/util.js

const errDiv = document.getElementById("errDiv");
const errWrapper = document.getElementById("errWrapper");

function setErr(x) {
  if (errDiv) {
    errDiv.innerHTML = x;
  }
  if (errWrapper) {
    errWrapper.style.display = "block";
  }
}

function closeErr() {
  if (errWrapper) {
    errWrapper.style.display = "none";
  }
}

function saveName() {
  console.log("saving username");
  const username = document.getElementById("name_entry");
  if (username) {
    console.log(username.value + "input found");
    document.cookie = "username=" + username.value;
  }
}

function loadName() {
  const username = document.getElementById("name_entry");
  if (username) {
    const cookies = document.cookie.split(";")
    cookies.forEach(c=>{
      console.log(c);
      if (c.trim().startsWith("username=")) {
        username.value = c.trim().split("=")[1];
      }
    });
  }
}

loadName();