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How to Build a JavaScript Popup Modal From Scratch
In this tutorial we’ll learn how to build JavaScript popup modals (popup windows) without using a framework like Bootstrap, or a third party library. We’ll build the whole thing from scratch, giving us complete control over how it works and looks. Here’s the demo we’ll be creating: 1. Begin With the Page Markup First we’ll create a modal. To do this, we’ll add the .modal class and a unique ID to a container. Next we’ll specify the dialog by setting a .modal-dialog element as the direct child of the .modal . The dialog will hold the modal content. This can be any kind of content like text, images, lightboxes, user notifications/alerts, etc. “A pop-up (or modal) is a small UI element that will appear in the foreground of a website, usually triggered as a prompt for the user to do something” – Adi Purdila To open a modal, we’ll need any element with the data-open attribute (normally a button ). The value of this attribute should be the ID of the desired modal. By default, a m