GitHub

Mitriy-Bug/js-popup

Подключаем файлы popup.js и popup.css размещаем блок всплывающего окна, лучше в конце страницы. Скрывать дополнительно не надо, для его класса ...
GitHub

XModelPopup is a pure Javascript popup class. It is written in pure javascript becuase it should be able to use with any other js library without any dependancy.

Include js library x_model_popup.js in your page. It can be included in header or footer, but it should be included before initialization of popup. Custom classes can be used for overlay, container, ...
Windows Report

5 Easy Tips to Customize Browser Alert Popups

Javascript is the programming language that dictates the browser alert popup function. Browser alert popups are in-browser notifications that convey messages to the user. The best way to customize the ...