--- title: ':checked' slug: 'Web/CSS/:checked' tags: - CSS - Layout - Pseudo-class - Reference - Web translation_of: 'Web/CSS/:checked' ---
:checked
CSS 의사 클래스 선택자는 선택했거나 on
상태인 라디오(<input type="radio">
), 체크박스(<input type="checkbox">
), 옵션({{HTMLElement("option")}} 요소를 나타냅니다.
/* Matches any checked/selected radio, checkbox, or option */ :checked { margin-left: 25px; border: 1px solid blue; }
사용자가 요소를 체크했거나 선택한 경우 활성화되고, 체크나 선택을 해제하는 경우 비활성화됩니다.
참고: 많은 경우 브라우저는 <option>
요소를 대체 요소로 취급하므로, :checked
의사 클래스를 사용한 스타일을 적용할 수 있는 범위도 브라우저마다 다릅니다.
<div> <input type="radio" name="my-input" id="yes"> <label for="yes">Yes</label> <input type="radio" name="my-input" id="no"> <label for="no">No</label> </div> <div> <input type="checkbox" name="my-checkbox" id="opt-in"> <label for="opt-in">Check me!</label> </div> <select name="my-select" id="fruit"> <option value="opt1">Apples</option> <option value="opt2">Grapes</option> <option value="opt3">Pears</option> </select>
div, select { margin: 8px; } /* Labels for checked inputs */ input:checked + label { color: red; } /* Radio element, when checked */ input[type="radio"]:checked { box-shadow: 0 0 0 3px orange; } /* Checkbox element, when checked */ input[type="checkbox"]:checked { box-shadow: 0 0 0 3px hotpink; } /* Option elements, when selected */ option:checked { box-shadow: 0 0 0 3px lime; color: red; }
{{EmbedLiveSample("기본_예제")}}
다음 예제 코드는 :checked
의사 클래스와 체크박스를 사용해, JavaScript 없이도 사용자가 켜거나 끌 수 있는 콘텐츠를 구현합니다.
<input type="checkbox" id="expand-toggle" /> <table> <thead> <tr><th>Column #1</th><th>Column #2</th><th>Column #3</th></tr> </thead> <tbody> <tr class="expandable"><td>[more text]</td><td>[more text]</td><td>[more text]</td></tr> <tr><td>[cell text]</td><td>[cell text]</td><td>[cell text]</td></tr> <tr><td>[cell text]</td><td>[cell text]</td><td>[cell text]</td></tr> <tr class="expandable"><td>[more text]</td><td>[more text]</td><td>[more text]</td></tr> <tr class="expandable"><td>[more text]</td><td>[more text]</td><td>[more text]</td></tr> </tbody> </table> <label for="expand-toggle" id="expand-btn">Toggle hidden rows</label>
/* Hide the toggle checkbox */ #expand-toggle { display: none; } /* Hide expandable content by default */ .expandable { visibility: collapse; background: #ddd; } /* Style the button */ #expand-btn { display: inline-block; margin-top: 12px; padding: 5px 11px; background-color: #ff7; border: 1px solid; border-radius: 3px; } /* Show hidden content when the checkbox is checked */ #expand-toggle:checked ~ * .expandable { visibility: visible; } /* Style the button when the checkbox is checked */ #expand-toggle:checked ~ #expand-btn { background-color: #ccc; }
{{EmbedLiveSample("숨겨진_체크박스를_사용해_요소_켜고_끄기", "auto", 220)}}
Specification | Status | Comment |
---|---|---|
{{ SpecName('HTML WHATWG', '#selector-checked', ':checked') }} | {{ Spec2('HTML WHATWG') }} | No change. |
{{ SpecName('HTML5 W3C', '#selector-checked', ':checked') }} | {{ Spec2('HTML5 W3C') }} | Defines the semantic regarding HTML. |
{{ SpecName('CSS4 Selectors', '#checked', ':checked') }} | {{ Spec2('CSS4 Selectors') }} | No change. |
{{ SpecName('CSS3 Selectors', '#checked', ':checked') }} | {{ Spec2('CSS3 Selectors') }} | Defines the pseudo-class, but not the associated semantic |
{{Compat("css.selectors.checked")}}