javascript - 如何在标题之后包装所有元素直到下一个相同或更高的标题？

标签 javascript jquery nextuntil

我的内容由标题(h1、h2、h3、h4、h5、h6)组成。

我需要什么:

使用 jQuery，我需要包装每个标题之后的所有元素，直到下一个相同的标题或更高的标题。所谓“更高”，我的意思是:

  • H5 比 h6“更高”。
  • H4 比 h5 和 h6“更高”。
  • H3 比 h4、h5 和 h6“更高”。

...等等，等等。

例如包装 h3 之后的所有元素，直到下一个 h3 或更高的标题(h1 或 h2)。

以下是所需最终结果的示例:

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: Arial;
  color: white;
  background-color: black;
  margin: 0;
  padding: 5px;
}

.h1-section,
.h2-section,
.h3-section,
.h4-section,
.h5-section,
.h6-section {
  border: 1px solid black;
  border-top: none;
  padding: 20px;
}
<h1>1</h1>
<section class="h1-section">
  <h2>2</h2>
  <section class="h2-section">
    <h3>3</h3>
    <section class="h3-section">
      <h4>4</h4>
      <section class="h4-section">
        <h5>5</h5>
        <section class="h5-section">
          <h6>6</h6>
          <section class="h6-section">
          </section>
        </section>
      </section>
    </section>
  </section>
</section>
<h1>1</h1>
<section class="h1-section">
  <h2>2</h2>
  <section class="h2-section">
    <h3>3</h3>
    <section class="h3-section">
      <h4>4</h4>
      <section class="h4-section">
        <h5>5</h5>
        <section class="h5-section">
          <h6>6</h6>
          <section class="h6-section">
          </section>
          <h6>6</h6>
          <section class="h6-section">
          </section>
        </section>
        <h5>5</h5>
        <section class="h5-section">
          <h6>6</h6>
          <section class="h6-section">
          </section>
          <h6>6</h6>
          <section class="h6-section">
          </section>
        </section>
      </section>
      <h4>4</h4>
      <section class="h4-section">
        <h5>5</h5>
        <section class="h5-section">
          <h6>6</h6>
          <section class="h6-section">
          </section>
          <h6>6</h6>
          <section class="h6-section">
          </section>
        </section>
        <h5>5</h5>
        <section class="h5-section">
          <h6>6</h6>
          <section class="h6-section">
          </section>
          <h6>6</h6>
          <section class="h6-section">
          </section>
        </section>
      </section>
    </section>
    <h3>3</h3>
    <section class="h3-section">
      <h4>4</h4>
      <section class="h4-section">
        <h5>5</h5>
        <section class="h5-section">
          <h6>6</h6>
          <section class="h6-section">
          </section>
          <h6>6</h6>
          <section class="h6-section">
          </section>
        </section>
        <h5>5</h5>
        <section class="h5-section">
          <h6>6</h6>
          <section class="h6-section">
          </section>
          <h6>6</h6>
          <section class="h6-section">
          </section>
        </section>
      </section>
      <h4>4</h4>
      <section class="h4-section">
        <h5>5</h5>
        <section class="h5-section">
          <h6>6</h6>
          <section class="h6-section">
          </section>
          <h6>6</h6>
          <section class="h6-section">
          </section>
        </section>
        <h5>5</h5>
        <section class="h5-section">
          <h6>6</h6>
          <section class="h6-section">
          </section>
          <h6>6</h6>
          <section class="h6-section">
          </section>
        </section>
      </section>
    </section>
  </section>
  <h2>2</h2>
  <section class="h2-section">
    <h3>3</h3>
    <section class="h3-section">
      <h4>4</h4>
      <section class="h4-section">
        <h5>5</h5>
        <section class="h5-section">
          <h6>6</h6>
          <section class="h6-section">
          </section>
          <h6>6</h6>
          <section class="h6-section">
          </section>
        </section>
        <h5>5</h5>
        <section class="h5-section">
          <h6>6</h6>
          <section class="h6-section">
          </section>
          <h6>6</h6>
          <section class="h6-section">
          </section>
        </section>
      </section>
      <h4>4</h4>
      <section class="h4-section">
        <h5>5</h5>
        <section class="h5-section">
          <h6>6</h6>
          <section class="h6-section">
          </section>
          <h6>6</h6>
          <section class="h6-section">
          </section>
        </section>
        <h5>5</h5>
        <section class="h5-section">
          <h6>6</h6>
          <section class="h6-section">
          </section>
          <h6>6</h6>
          <section class="h6-section">
          </section>
        </section>
      </section>
    </section>
    <h3>3</h3>
    <section class="h3-section">
      <h4>4</h4>
      <section class="h4-section">
        <h5>5</h5>
        <section class="h5-section">
          <h6>6</h6>
          <section class="h6-section">
          </section>
          <h6>6</h6>
          <section class="h6-section">
          </section>
        </section>
        <h5>5</h5>
        <section class="h5-section">
          <h6>6</h6>
          <section class="h6-section">
          </section>
          <h6>6</h6>
          <section class="h6-section">
          </section>
        </section>
      </section>
      <h4>4</h4>
      <section class="h4-section">
        <h5>5</h5>
        <section class="h5-section">
          <h6>6</h6>
          <section class="h6-section">
          </section>
          <h6>6</h6>
          <section class="h6-section">
          </section>
        </section>
        <h5>5</h5>
        <section class="h5-section">
          <h6>6</h6>
          <section class="h6-section">
          </section>
          <h6>6</h6>
          <section class="h6-section">
          </section>
        </section>
      </section>
    </section>
  </section>
</section>

我尝试过的:

使用 jQuery，我尝试使用 .nextUntil()，但我错误地选择和包装了元素:

$(document).ready(function() {
  $("h1").nextUntil("h1").wrapAll("<section class='h1-section'></section>");
  $("h2").nextUntil("h1, h2").wrapAll("<section class='h2-section'></section>");
  $("h3").nextUntil("h1, h2, h3").wrapAll("<section class='h3-section'></section>");
  $("h4").nextUntil("h1, h2, h3, h4").wrapAll("<section class='h4-section'></section>");
  $("h5").nextUntil("h1, h2, h3, h4, h5").wrapAll("<section class='h5-section'></section>");
  $("h6").nextUntil("h1, h2, h3, h4, h5, h6").wrapAll("<section class='h6-section'></section>");
});
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: Arial;
  color: white;
  background-color: black;
  margin: 0;
  padding: 5px;
}

.h1-section,
.h2-section,
.h3-section,
.h4-section,
.h5-section,
.h6-section {
  border: 1px solid black;
  border-top: none;
  padding: 20px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<h1>1</h1>
<h2>2</h2>
<h3>3</h3>
<h4>4</h4>
<h5>5</h5>
<h6>6</h6>
<h1>1</h1>
<h2>2</h2>
<h3>3</h3>
<h4>4</h4>
<h5>5</h5>
<h6>6</h6>
<h6>6</h6>
<h5>5</h5>
<h6>6</h6>
<h6>6</h6>
<h4>4</h4>
<h5>5</h5>
<h6>6</h6>
<h6>6</h6>
<h5>5</h5>
<h6>6</h6>
<h6>6</h6>
<h3>3</h3>
<h4>4</h4>
<h5>5</h5>
<h6>6</h6>
<h6>6</h6>
<h5>5</h5>
<h6>6</h6>
<h6>6</h6>
<h4>4</h4>
<h5>5</h5>
<h6>6</h6>
<h6>6</h6>
<h5>5</h5>
<h6>6</h6>
<h6>6</h6>
<h2>2</h2>
<h3>3</h3>
<h4>4</h4>
<h5>5</h5>
<h6>6</h6>
<h6>6</h6>
<h5>5</h5>
<h6>6</h6>
<h6>6</h6>
<h4>4</h4>
<h5>5</h5>
<h6>6</h6>
<h6>6</h6>
<h5>5</h5>
<h6>6</h6>
<h6>6</h6>
<h3>3</h3>
<h4>4</h4>
<h5>5</h5>
<h6>6</h6>
<h6>6</h6>
<h5>5</h5>
<h6>6</h6>
<h6>6</h6>
<h4>4</h4>
<h5>5</h5>
<h6>6</h6>
<h6>6</h6>
<h5>5</h5>
<h6>6</h6>
<h6>6</h6>

如何使用 jQuery 实现预期的结果？

最佳答案

问题是这样的:

$("h5").nextUntil("h5")

将返回 所有 的 nextUntils，而不仅仅是您期望的 each h5。即它将获得第一个 h5 的 nextUntils 并将它们与第二个 h5 的 nextUntils 组合，等等然后当你应用 wrapAll 时，它将 wrapAll all 它们，而不是只是个人集。

使用 .text() 来显示的例子

console.log($("h5").nextUntil("h5").length, $("h5").nextUntil("h5").text())
h5,h6 { margin:0; padding:0; }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h5></h5><h6>1</h6><h6>2</h6>
<h5></h5><h6>3</h6><h6>4</h6>

所以你需要一次查看每个h5

$("h5").each(function() {
    console.log($(this).nextUntil("h5").length, $(this).nextUntil("h5").text())
});
h5,h6 { margin:0; padding:0; }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h5></h5><h6>1</h6><h6>2</h6>
<h5></h5><h6>3</h6><h6>4</h6>

然后您可以将 .length/.text() 替换为您的 .wrapAll():

$("h5").each(function() {
    $(this).nextUntil("h5").wrapAll("<div class='section-h5'>")
});
$("h6").each(function() {
    $(this).nextUntil("h6,h5").wrapAll("<div class='section-h6'>")
});
h5,h6 { margin:0; padding:5px; }
h5 {  margin-top:4px;  }
h6 { }

.section-h5 { padding: 5px; border:1px solid blue; }
.section-h6 { padding: 5px; border:1px solid green; }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h5></h5><h6></h6><div>1</div><h6></h6><div>2</div>
<h5></h5><h6></h6><div>3</div><h6></h6><div>4</div>

(根据需要扩展到其他H级别)

关于javascript - 如何在标题之后包装所有元素直到下一个相同或更高的标题？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/49546722/

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