"was created with unknown prop" warning on when using $$props.*

[btakita]

Using $$props.class causes the warning. Since class is a keyword, the suggested way to access class was to use $$props.class.

[btakita]

This issue seems related to #2840.

[btakita]

Also getting:

<Component> was created with unknown prop '$$slots'
<Component> was created with unknown prop '$$scope'

[Conduitry]

This is still a valid bug, but the suggested way to have a prop called class is not to use $$props.class - see https://svelte.dev/docs#1_export_creates_a_component_prop