How can I use custom icon in Vuejs 3?

Hi,

It depends on which icon set you want to use.

Here is example on how you can use font-awesome icons:

<i class="far fa-lightbulb text-white"></i>

You can check more examples on our font-awesome doc page:
https://preview.keenthemes.com/metronic8/vue/docs/#/icons/font-awesome

Also check other available icons sets in our doc:
Duotune
Bootstrap-icons
Line-awesome