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:checked
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2015년 7월.
:checked CSS 의사 클래스 선택자는 선택했거나 on 상태인 라디오(<input type="radio">), 체크박스(<input type="checkbox">), 옵션(<option> 요소를 나타냅니다.
css
/* 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.
구문
Error: could not find syntax for this item예제
기본 예제
HTML
html
<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>
CSS
css
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;
}
결과
[フレーム]
숨겨진 체크박스를 사용해 요소 켜고 끄기
다음 예제 코드는 :checked 의사 클래스와 체크박스를 사용해, JavaScript 없이도 사용자가 켜거나 끌 수 있는 콘텐츠를 구현합니다.
HTML
html
<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>
CSS
css
/* 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;
}
결과
[フレーム]
명세
| Specification |
|---|
| HTML # selector-checked |
| Selectors Level 4 # checked-pseudo |
브라우저 호환성
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