Modal Popup Pure Javascript, Contribute to KaneCohen/modal-vanilla development by creating an account on GitHub. This is where I have a problem because I can't append that modal to document and I have Modal Popup with CSS and JavaScript - Step-by-step guide to creating a simple Popup using JavaScript and CSS. Lets build a HTML- and CSS-only Popup Modal Last week I posted a detailed introduction about the basic building blocks we will need for this project: Custom Styled CSS What is a modal window? ‍ Modal windows (also called modal boxes or modal dialogs) are UI elements that appear on top of a product’s user interface as a Modal or popup windows are very useful elements of websites or webapps – you can display in it a notifications, additional or detailed information or it can be a “dialog window” in Modal is supposed to be created through javascript (through createElement method). A responsive, fullscreen, fully accessible modal popup built with HTML/CSS/CSS3. Wait, you can build modal windows without JavaScript? Yep, that's CSS secretly laughing at JavaScript Tagged with webdev, css, html, javascript. Tagged with javascript, webdev. Pure-modal is a minimal, clean, accessible, animated modal component for modern web design. No JavaScript required. 25s, opacity 0. Let's make a custom version of window.