class:__

There are a variety of ways to set CSS Classes. To remove a class set it to undefined, null orfalse

# List

On where the className could be changed for a reactive value

class="className"

class="className1 className2"

class={{ className: falsy/truthy }}

class:className={falsy/truthy}

class:my-ns={{ className: falsy/truthy }}

When passing an object with the classNames as keys, it wont handle the removal of classes not present in the object. To remove a class set the value to falsy

The different ways to set CSS classes