如果用Cookie单击按钮，如何关闭弹出模式？

I am using the plugin js-cookie to create cookies. So, I have a bootstrap modal that pops up after 15 seconds its an email subscription form. What I would like is for the subscribe button to create a cookie that prevents future pop ups. I think my logic may be wrong here. Dev tools shows the cookies but I refresh and the pop up still appears.I am using the plugin js-cookie to create cooki