:placeholder-shownThe :placeholder-shown CSS pseudo-element selects <input> and <textarea> elements when no value is set and the element's placeholder attribute is not empty. Not to be confused with ::placeholder, which selects the placeholder text itself.selectorsSelectorswidely2020-01-152022-07-15https://drafts.csswg.org/selectors-4/#placeholdercss-placeholder-shownhttps://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:placeholder-showncss.selectors.placeholder-showncss.selectors.placeholder-shown.non_text_typeshttps://nowyoucanuse.com/features--placeholder-shown.html