Set dynamic css class on vue,js

I’m trying to set a dynamic class in a vue.js, something like

 <strong :class=`color-${category.level}`>{{ category.name }}</strong>

this html is inside a for loop and I need the category.value on this loop but it’s not working

>Solution :

The bound class value should be wrapped by quotes :class='...' or double-quotes :class="..." :

<strong :class="`color-${category.level}`"></strong>