Since the :checked pseudo-course relates to the checkbox, #demo:checked + label will only utilize once the checkbox is checked. @Sparky672, Pretty much every thing: caniuse.com/#feat=css-sel2 (IE7 supports :Lively way too but is just not shown since it does not guidance several of the other selectors) This article is actuality-checked, guaranteeing https://jaidenpacpk.ivasdesign.com/60635042/service-provider-an-overview