The CSS :checked selector is used to select the radio input elements "radio" and checkbox elements "checkbox" when they are checked. Also the option element ("option" that is within "select") when it is selected.
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The CSS :checked selector is used to select the radio input elements "radio" and checkbox elements "checkbox" when they are checked. Also the option element ("option" that is within "select") when it is selected.
[ Ссылка ]