Modal Dialogs with UIKit

Many CSS toolkits include styles (and Javascript) for creating modal dialog boxes. This example shows how to use HTMX to display dynamic dialog using UIKit, and how to trigger its animation styles with little or no Javascript.

We start with a button that triggers the dialog, along with a DIV at the bottom of your markup where the dialog will be loaded:

This is an example of using HTMX to remotely load modal dialogs using UIKit.

<button 
	id="showButton"
	hx-get="/uikit-modal.html" 
	hx-target="#modals-here" 
	class="uk-button uk-button-primary" 
	_="on htmx:afterOnLoad wait 10ms then add .uk-open to #modal">Open Modal</button>

<div id="modals-here"></div>

This button uses a GET request to /uikit-modal.html when this button is clicked. The contents of this file will be added to the DOM underneath the #modals-here DIV.

We’re replacing the standard UIKit Javascript library with a little bit of Hyperscript, which triggers UIKit’s smooth animations. It is delayed by 10ms so that UIKit’s animations will run correctly.

Finally, the server responds with a slightly modified version of UIKit’s standard modal

<div id="modal" class="uk-modal" style="display:block;">
	<div class="uk-modal-dialog uk-modal-body">
		<h2 class="uk-modal-title">Modal Dialog</h2>
		<p>This modal dialog was loaded dynamically by HTMX.</p>

		<form _="on submit take .uk-open from #modal">
			<div class="uk-margin">
				<input class="uk-input" placeholder="What is Your Name?">
			</div>
			<button type="button" class="uk-button uk-button-primary">Save Changes</button>
			<button 
				id="cancelButton"
				type="button" 
				class="uk-button uk-button-default" 
				_="on click take .uk-open from #modal wait 200ms then remove #modal">Close</button>
		</form>
	</div>
</div>

Hyperscript on the button and the form trigger animations when this dialog is completed or canceled. If you don’t want to use Hyperscript, the modals will still work but UIKit’s fade in animations will not be triggered.

Alternatively, you can add and remove these CSS classes without Hyperscript, by using in straight Javascript.
It’s just a lot more code:

// This triggers the fade-in animation when a modal dialog is loaded and displayed
window.document.getElementById("showButton").addEventListener("htmx:afterOnLoad", function() {
	setTimeout(function(){
		window.document.getElementById("modal").classList.add("uk-open")
	}, 10)
})


// This triggers the fade-out animation when the modal is closed.
window.document.getElementById("cancelButton").addEventListener("click", function() {
	window.document.getElementById("modal").classList.remove("uk-open")
	setTimeout(function(){
		window.document.getElementById("modals-here").innerHTML = ""
		,200
	})
})

🔗Demo