How to Toggle Classes in Svelte

How to Toggle Classes in Svelte

Ferenc Almasi β€’ 2020 September 25 β€’ πŸ“– 1 min read
  • twitter
  • facebook

You can use the class directive in Svelte to easily toggle classes on an element.

<!-- You can use the class: directive to toggle a class on an element -->

<!-- πŸ”΄ Instead of -->
<li class="{active ? 'active' : ''}">Dashboard</li>

<!-- βœ… You can do -->
<!-- The two are equivalent -->
<li class:active={active}>Dashboard</li>
Copied to clipboard!

If both name and value match, you can also simplify things by omitting both the class name and the variable assignment as well:

<li class:active>Dashboard</li>
Copied to clipboard!

You also have the option to define multiple classes at once, like so:

<li class:inactive class:hidden>Secrets</li>
Copied to clipboard!
How to Toggle Classes in Svelte
If you would like to see more Webtips, follow @flowforfrank

Looking into SvelteΒ 3
Looking to improve your skills? Learn how to build reactive apps with Svelte + Tailwind.
Master Svelte


Did you find this page helpful?
πŸ“š More Webtips
Frontend Course Dashboard
Master the Art of Frontend
  • check Unlimited access to hundred of tutorials
  • check Access to exclusive interactive lessons
  • check Remove ads to learn without distractions
Become a Pro