Computed attributes

When any of your attributes is prefixed with a colon (:), the output of the given expression will be used as the attribute value (the colon character will be dropped during rendering).

The attribute value must be a php expression which resolves to a stringable data.

Computed attribute example

<div :id="$this->myId"></div>

In this case, if your component class has a property myId that has 42 as a value, the div above will render as <div id="42"></div>