返回值:jQuery:nth-of-type(n|even|odd|formula)
V1.9概述
選擇同屬于一個(gè)父元素之下，并且標(biāo)簽名相同的子元素中的第n個(gè)。
因?yàn)閖Query的實(shí)現(xiàn):nth-是嚴(yán)格來(lái)自CSS規(guī)范，n值是“1-indexed”，也就是說(shuō)，從1開(kāi)始計(jì)數(shù)。對(duì)于所有其他選擇器表達(dá)式比如:eq()?或?:even?，jQuery遵循JavaScript的“0索引”的計(jì)數(shù)。
這個(gè)不尋常的用法，可進(jìn)一步討論中找到W3C CSS specification.
參數(shù)
nV1.9
The index of each child to match.
Must be a number. The first element has the index number 1.
evenV1.9
Selects each even child element
oddV1.9
Selects each odd child element
formulaV1.9
Specifies which child element(s) to be selected with a formula (an?+?b). Example: p:nth-last-child(3n+2) selects each 3rd paragraph, starting at the last 2nd child
示例
查找每個(gè)span，這個(gè) span 是 其所有兄弟span元素中的第二個(gè)元素。
<div>
<span>John</span>
<b>Kim</b>
<span>Adam</span>
<b>Rafael</b>
<span>Oleg</span>
</div>
<div>
<b>Dave</b>
<span>Ann</span>
</div>
<div>
<i><span>Maurice</span></i>
<span>Richard</span>
<span>Ralph</span>
<span>Jason</span>
</div> $("span:nth-of-type(2)");