[英]How to select first class in a list of class definition for an element
I have these elements : 我有这些要素:
<div id="contentoDinamico">
<div id="item_box_3777" class="index0 itemContenutoDinamico attivo">
<div id="item_box_3792" class="index4 itemContenutoDinamico">
</div>
and this function : 和这个功能:
$("#contentoDinamico div").attr('class', function(i, e) {
a.push(e);
});
but I'd like to push only first class for each div child; 但我只想为每个div孩子推头等舱; so, in the example, index0
and index4
, not index0 itemContenutoDinamico attivo
and index4 itemContenutoDinamico
. 因此,在示例中, index0
和index4
,而不是index0 itemContenutoDinamico attivo
和index4 itemContenutoDinamico
。
How can I do this? 我怎样才能做到这一点?
HTML5 compatible browsers add a classList
property to elements which you can index directly. 兼容HTML5的浏览器将classList
属性添加到可以直接索引的元素。 Alternatively you'd have to split the class value by space characters: 或者,您必须将类值用空格字符分开:
$("#contentoDinamico div").each(function(i, e) {
if ('classList' in this) {
a.push(this.classList[0]);
} else {
var cn = this.className;
var ca = cn.split(' ');
a.push(c[0]);
}
}
The space splitting version might break if you have leading spaces in your class attribute. 如果您的class属性中有前导空格,则空格分割版本可能会中断。
用空格分隔返回的类,然后在其中有了它:
.split(/\s/)
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