Chrome extension site auth save.

auth.js

function Site(host, loginUrl, jqEls) {
  this.host = host;
  this.loginUrl = loginUrl;

  this.usernameEl = jqEls.usernameEl;
  this.passwordEl = jqEls.passwordEl;
  this.captchaEl = jqEls.captchaEl;
  this.buttonEl = jqEls.buttonEl;
}

Site.prototype.saveUserAuth = function(key) {
  var username = this.usernameEl.val();
  var password = this.passwordEl.val();
  var captcha = this.captchaEl.val();
  if (username && password && captcha) {
    var userAuth = {
      username: username,
      password: password,
    };
    var obj = {};
    obj[key] = userAuth;
    chrome.storage.sync.set(obj, function() {
      console.log('%s was saved.', key);
    });
  }
};

Site.prototype.autoFill = function(key, result) {
  var userAuth = result[key];
  if (userAuth) {
    var username = userAuth.username;
    var password = userAuth.password;
    this.usernameEl.val(username);
    this.passwordEl.val(password);
  }
};

Site.prototype.onInit = function() {
  if (new RegExp(this.host).test(window.location.host)) {
    if (window.location.href.includes(this.loginUrl)) {
      var userAuthKey = this.host + '[auth]';

      chrome.storage.sync.get(
        [userAuthKey],
        this.autoFill.bind(this, userAuthKey)
      );

      this.buttonEl.click(this.saveUserAuth.bind(this, userAuthKey));
    }
  }
};

$(function() {
  // handleSiteBLogin();
  var siteA = new Site('www.trgj33.com', '//www.trgj33.com/login.html', {
    usernameEl: $('#j_username'),
    passwordEl: $('#j_password'),
    captchaEl: $('#j_captcha'),
    buttonEl: $('#j_button'),
  });

  var siteB = new Site('qm5560.com', '//qm5560.com', {
    usernameEl: $(document.getElementById('loginForm[userName]')),
    passwordEl: $('#password'),
    captchaEl: $(document.getElementById('loginForm[captcha]')),
    buttonEl: $('#loginBtn'),
  });

  siteA.onInit();
  siteB.onInit();
});