+++
title = "Custom Modal Dialogs"
template = "demo.html"
+++
While htmx works great with dialogs built into CSS frameworks (like [Bootstrap](@/examples/modal-bootstrap.md) and [UIKit](@/examples/modal-uikit.md)), htmx also makes
it easy to build modal dialogs from scratch. Here is a quick example of one way to build them.
Click here to see a demo of the final result:
## High Level Plan
We're going to make a button that loads remote content from the server, then displays it in a modal dialog. The modal
content will be added to the end of the `` element, in a div named `#modal`.
In this demo we'll define some nice animations in CSS, and then use some [Hyperscript](https://hyperscript.org) to remove the
modals from the DOM when the user is done. Hyperscript is *not* required with htmx, but the two were designed to be used
together and it is much nicer for writing async & event oriented code than JavaScript, which is why we chose it for this
example.
## Main Page HTML
```html
```
## Modal HTML Fragment
```html
Modal Dialog
This is the modal content.
You can put anything here, like text, or a form, or an image.
```
## Custom Stylesheet
```css
/***** MODAL DIALOG ****/
#modal {
/* Underlay covers entire screen. */
position: fixed;
top:0px;
bottom: 0px;
left:0px;
right:0px;
background-color:rgba(0,0,0,0.5);
z-index:1000;
/* Flexbox centers the .modal-content vertically and horizontally */
display:flex;
flex-direction:column;
align-items:center;
/* Animate when opening */
animation-name: fadeIn;
animation-duration:150ms;
animation-timing-function: ease;
}
#modal > .modal-underlay {
/* underlay takes up the entire viewport. This is only
required if you want to click to dismiss the popup */
position: absolute;
z-index: -1;
top:0px;
bottom:0px;
left: 0px;
right: 0px;
}
#modal > .modal-content {
/* Position visible dialog near the top of the window */
margin-top:10vh;
/* Sizing for visible dialog */
width:80%;
max-width:600px;
/* Display properties for visible dialog*/
border:solid 1px #999;
border-radius:8px;
box-shadow: 0px 0px 20px 0px rgba(0,0,0,0.3);
background-color:white;
padding:20px;
/* Animate when opening */
animation-name:zoomIn;
animation-duration:150ms;
animation-timing-function: ease;
}
#modal.closing {
/* Animate when closing */
animation-name: fadeOut;
animation-duration:150ms;
animation-timing-function: ease;
}
#modal.closing > .modal-content {
/* Animate when closing */
animation-name: zoomOut;
animation-duration:150ms;
animation-timing-function: ease;
}
@keyframes fadeIn {
0% {opacity: 0;}
100% {opacity: 1;}
}
@keyframes fadeOut {
0% {opacity: 1;}
100% {opacity: 0;}
}
@keyframes zoomIn {
0% {transform: scale(0.9);}
100% {transform: scale(1);}
}
@keyframes zoomOut {
0% {transform: scale(1);}
100% {transform: scale(0.9);}
}
```