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CSS 參考手冊

CSS 參考手冊 CSS 選擇器 CSS 語音參考 CSS Web 安全字體 CSS 動畫 CSS 單位 CSS 顏色 CSS 合法顏色值 CSS 顏色名稱 CSS 顏色十六進制值 CSS 瀏覽器支持

CSS 屬性

align-content align-items align-self all animation animation-delay animation-direction animation-duration animation-fill-mode animation-iteration-count animation-name animation-play-state animation-timing-function appearance backface-visibility background background-attachment background-blend-mode background-clip background-color background-image background-origin background-position background-repeat background-size border border-bottom border-bottom-color border-bottom-left-radius border-bottom-right-radius border-bottom-style border-bottom-width border-collapse border-color border-image border-image-outset border-image-repeat border-image-slice border-image-source border-image-width border-left border-left-color border-left-style border-left-width border-radius border-right border-right-color border-right-style border-right-width border-spacing border-style border-top border-top-color border-top-left-radius border-top-right-radius border-top-style border-top-width border-width bottom box-align box-direction box-flex box-flex-group box-lines box-ordinal-group box-orient box-pack box-shadow box-sizing caption-side clear clip color column-count column-fill column-gap column-rule column-rule-color column-rule-style column-rule-width column-span column-width columns content counter-increment counter-reset cursor direction display empty-cells filter flex flex-basis flex-direction flex-flow flex-grow flex-shrink flex-wrap float font @font-face font-family font-size font-size-adjust font-stretch font-style font-variant font-weight grid-columns grid-rows hanging-punctuation height icon justify-content @keyframes left letter-spacing line-height list-style list-style-image list-style-position list-style-type margin margin-bottom margin-left margin-right margin-top max-height max-width @media min-height min-width nav-down nav-index nav-left nav-right nav-up opacity order outline outline-color outline-offset outline-style outline-width overflow overflow-x overflow-y padding padding-bottom padding-left padding-right padding-top page-break-after page-break-before page-break-inside perspective perspective-origin position punctuation-trim quotes resize right rotation tab-size table-layout target target-name target-new target-position text-align text-align-last text-decoration text-decoration-color text-decoration-line text-decoration-style text-indent text-justify text-outline text-overflow text-shadow text-transform text-wrap top transform transform-origin transform-style transition transition-delay transition-duration transition-property transition-timing-function unicode-bidi vertical-align visibility white-space width word-break word-spacing word-wrap z-index

CSS :first-child 偽元素

CSS完整選擇器 完整CSS選擇器參考手冊

實例

匹配屬於父元素中第一個子元素的每個<p>元素

p:first-child
{
background-color:yellow;
}

嘗試一下»

定義和用法

:only-child選擇器匹配屬於父元素中唯一子元素的元素。


瀏覽器支持

表格中的數字表示支持該屬性的第一個瀏覽器版本號。

选择器
:first-child 4.0 7.0 3.0 3.1 9.6

注意: :first-child在IE8和更早版本IE版本中必須聲明<!DOCTYPE>


相關文章

CSS教程: CSS偽類


Examples

更多實例


實例

<p>元素是其父級的第一個子元素,每個<p>元素的<i>元素的樣式:

p:first-child i
{
background:yellow;
}

嘗試一下»

實例

列表中的第一個<li>元素選擇的樣式:

li:first-child
{
background:yellow;
}

嘗試一下»

實例

每一個<ul>元素的第一個子元素選擇的樣式::

ul>:first-child
{
background:yellow;
}

嘗試一下»


CSS完整選擇器 完整CSS選擇器參考手冊