svelte/documentation/tutorial/13-advanced-styling/02-class-shorthand/text.md

title
Shorthand class directive

Often, the name of the class will be the same as the name of the value it depends on:

<div class:big={big}>
	<!-- ... -->
</div>

In those cases we can use a shorthand form:

<div class:big>
	<!-- ... -->
</div>