使用jquery添加类属性

Question

如何使用jquery在每个发送段落中添加类。请看下面的图片。

Answer 1

您可以使用CREATE OR REPLACE TRIGGER AFTERIUDLIQUIDATIONSDETAILS BEFORE INSERT OR DELETE ON LIQUIDATIONSDETAILS FOR EACH ROW --WHEN (NEW.PERIODID <> FN_PERIODNEXT) BEGIN If FN_PERIODNEXT <> :NEW.PERIOD then IF INSERTING THEN UPDATE APPOINTSOFCAS SET INLD = INLD + 1 WHERE CUSTOMERID = :NEW.CUSTOMERID AND ID = :NEW.APPOINTOFCAID AND KINDCONTROLID = :NEW.KINDCONTROLID; END IF; IF DELETING THEN UPDATE APPOINTSOFCAS SET INLD = INLD - 1 WHERE CUSTOMERID = :OLD.CUSTOMERID AND ID = :OLD.APPOINTOFCAID AND KINDCONTROLID = :OLD.KINDCONTROLID; END IF; END IF; END; / 以及.newsPostContainer p排除:not()元素：

.postDate

或者，如果您可以保证目标$('.newsPostContainer p:not(.postDate)').addClass('posteExcerpt'); 始终以p开头，那么您可以选择兄弟姐妹：

p.postDate

Answer 2

检查遍历的'P'标签是否具有'postDate'类，如果没有，这是第二个'P'标签和addClass。

:not

已实现，您也可以使用df = df.reindex(columns = header_list) 。

Answer 3

p.postDate + p会选择p后面的所有p.postDate

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$(".newsPostContainer  p.postDate + p").addClass('posteExcerpt')

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<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="newsPostContainer ">
  <p class="postDate">postDate</p>
  <p>posteExcerpt</p>
  <p class="postDate">postDate</p>
  <p>posteExcerpt</p>
  <p class="postDate">postDate</p>
  <p>posteExcerpt</p>
  <p class="postDate">postDate</p>
  <p>posteExcerpt</p>
  <p class="postDate">postDate</p>
  <p>posteExcerpt</p>
</div>

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