That's a correct behavior from your IDE, because addClass with a string parameter is meant to add one class.
For multiple classes, refer to this documentation:
{% set classes = [ 'red', 'green', ] %} <div{{ attributes.addClass(classes) }}></div>
<ul{{attributes.addClass('container container-desktop')}}>
when I press Command + / (autoformat), all my classes are without whitespace:
<ul{{attributes.addClass('containercontainer-desktop')}}>
I searched in the settings of Visual Studio Code for a setting. But did not found a solution to disable it.
That's a correct behavior from your IDE, because addClass with a string parameter is meant to add one class.
For multiple classes, refer to this documentation:
{% set classes = [ 'red', 'green', ] %} <div{{ attributes.addClass(classes) }}></div>
I solve it now like that: <div{{ attributes.addClass(classes['red', 'green']) }}></div> Thank u!