function isImage(url) {
  let imgArr = ["jpg", "jpeg", "png", "gif"];
  let lastIndex = url.lastIndexOf(".");
  return imgArr.indexOf(url.substring(lastIndex + 1, url.length)) != -1;
}

function checkToken(title = "尚未登录，正在体验") {
  if (!wx.getStorageSync("accessToken")) {
    wx.showToast({
      title,
      icon: "none",
    });
    return false;
  }
  return true;
}

module.exports = {
  isImage,
  checkToken,
};