Question

我的html是从外部来源引入的。问题是我希望使用br定位双jQuery，以便我可以完全删除第一个双br并将所有其余的双br转换为单br。

html如下所示：

<div class="bottom-paragraph-drop">
    <br>
    <br>
    is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
    <br>
    <br>
    is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
</div>

jQuery的：

不知道该怎么做;

的内容

$('.bottom-paragraph-drop br').next('br').remove()

Answer 1

给出以下HTML：

<input type="button" id="myBtn" value="Do It">
<div class="bottom-paragraph-drop">
  <br />
  <br /> is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.is simply dummy
  text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.is simply dummy text of the printing
  and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
  <br />
  <br /> is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
</div>

您可以通过迭代div中的break标记并测试下一个元素是否为中断（然后删除元素）来消除第二个中断标记：

$('#myBtn').click(function() {
  $('div br').each(function() {
    if ($(this).next().is('br')) {
      $(this).next().remove();
    }
  });
});

这是Fiddle Demo。

Answer 2

你可以遍历所有的br元素并删除前两个，然后在索引中交替的brs -

val rdd = org.apache.spark.mllib.random.RandomRDDs.normalRDD(sc, 100, 10, 323L)
rdd.sortBy(identity).take(3)
// Array[Double] = 
//   Array(-2.678684754806642, -1.4394327869537575, -1.2573154896913827)

应该这样做。

Answer 3

您可以使用RegularExpression定位这些br元素：

var div = document.querySelector('.bottom-paragraph-drop');
var text = div.innerHTML;
var result = text.replace(/^\s*<br>\s*<br>/, "").replace(/<br>\s*<br>/g, "<br>");
div.innerHTML = result;

<div class="bottom-paragraph-drop">
    <br>
    <br>
    is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
    <br>
    <br>
    is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
    <br>
    <br>
    is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
    <br>
    <br>
    is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
</div>

或者，如果你想定位'自闭'标签你的正则表达式看起来像这样：

/<br\s*\/*>\s*<br\s*\/*>/

仅删除第一组双br，将其他双br转换为单br

3 个答案: