Dark Theme for Your Knack Apps

Here is a simple way to add a Dark Theme/Dark Mode to your Knack apps.

Here is what you’ll be creating:


Step 1:
Create a Page and call it Dark Mode:

Step 2:

Add this code to your CSS:

/* Dark Mode */

html[theme='dark-mode'] {
  filter: invert(1) hue-rotate(180deg);

html[theme='dark-mode'] img {
  filter: invert(1) hue-rotate(180deg);

html {
  transition: color 300ms, background-color 300ms;

Step 3:
Add this code to your JavaScript:

/* Dark Mode */
$(document).on('knack-scene-render.any', function(event, scene) {
  const darkModeButton = $('a[data-kn-slug="#dark-mode"]') // Replace "dark-mode" with whatever your Page URL is from Step 1

  darkModeButton.on('click', () => {
    let theme = $('html').attr('theme')
    if (theme == 'dark-mode') {
      $('html').attr('theme', '')
    } else {
      $('html').attr('theme', 'dark-mode')

Congratulations! Your app now has a Dark Mode. :crescent_moon:

To improve this further you’ll probably want to make Dark Mode-specific CSS adjustments but the steps described here will give you a great start.

If you want help adding dark mode to your app—or other Design & UX features—feel free to reach out.

Knack Pros