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javascript - 更改孩子的href目的地

问题描述

我有一堆带有子 div 的块（div），它们有链接（sp-pcp-readmore）我想用 jQuery 更改每个链接的 href 值（sp-pcp-readmore）。一个 div（块）的 HTML 如下：

<div class="sp-pcp-post pcp-item-4978" data-id="4978">
    <div class="pcp-post-thumb-wrapper">
        <div class="sp-pcp-post-thumb-area">
            <a
                class="sp-pcp-thumb"
                aria-label="feature_image"
                href="/machines/"
                target="_blank"
            >
                <img
                    src="machine-300x300.jpg"
                    data-src="machine-300x300.jpg"
                    class="pcp-lazyload lazy-loaded"
                    alt=""
                    width="300"
                    height="300"
                />
            </a>
        </div>
    </div>

    <h2 class="sp-pcp-title">
        <a href="/machines/" target="_blank"
            >Machines</a
        >
    </h2>

    <div class="sp-pcp-post-content">
        <div class="sp-pcp-readmore">
            <a
                class="pcp-readmore-link"
                target="_blank"
                href="/machines/"
            >
                Explore Now
            </a>
        </div>
    </div>
</div>

我遇到问题的javascript就是这个，它根本没有改变href

        $(".sp-pcp-title").each(function() {
            switch($(this).text()) {
                case "Machines":
                        $(this).find(".pcp-readmore-link").attr('href', '/product-category/machines/');
                    break;
                case "Weights":
                        $(this).find(".pcp-readmore-link").attr('href', '/product-category/weights/')
                    break;
                case "Dumbells":
                        $(this).find(".pcp-readmore-link").attr('href', '/product-category/dumbells/')
                    break;
                case "Barbels":
                        $(this).find(".pcp-readmore-link").attr('href', '/product-category/barbels/')
                    break;
            }
        });

标签： javascripthtmljquery

解决方案

这可以大大简化

$(".sp-pcp-title").each(function() {
  let text = $("a",this).text().trim();
  $(this).next().find(".pcp-readmore-link").attr('href', `/product-category/${text.toLowerCase()}`);
});


$(".sp-pcp-title").each(function() {
  let text = $("a",this).text();
  $(this).next().find(".pcp-readmore-link").attr('href', `/product-category/${text.toLowerCase()}`);
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="sp-pcp-post pcp-item-4978" data-id="4978">
  <div class="pcp-post-thumb-wrapper">
    <div class="sp-pcp-post-thumb-area">
      <a class="sp-pcp-thumb" aria-label="feature_image" href="/machines/" target="_blank">
        <img src="machine-300x300.jpg" data-src="machine-300x300.jpg" class="pcp-lazyload lazy-loaded" alt="" width="300" height="300" />
      </a>
    </div>
  </div>

  <h2 class="sp-pcp-title">
    <a href="/machines/" target="_blank">Machines</a>
  </h2>
  <div class="sp-pcp-post-content">
    <div class="sp-pcp-readmore">
      <a class="pcp-readmore-link" target="_blank" href="">Explore Now</a>
    </div>
  </div>
</div>

选择

const hrefs = { "Machine":"machine", "Bar- and dumbells":"weights" }
$(".sp-pcp-title").each(function() {
  let text = $("a",this).text().trim();
  $(this).next().find(".pcp-readmore-link").attr('href', `/product-category/${hrefs[text]}`);
});


    const hrefs = { "Machines":"machines", "Bar- and dumbells":"weights" }
    $(".sp-pcp-title").each(function() {
      let text = $("a",this).text().trim();
      $(this).next().find(".pcp-readmore-link").attr('href', `/product-category/${hrefs[text]}`);
    });
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="sp-pcp-post pcp-item-4978" data-id="4978">
  <div class="pcp-post-thumb-wrapper">
    <div class="sp-pcp-post-thumb-area">
      <a class="sp-pcp-thumb" aria-label="feature_image" href="/machines/" target="_blank">
        <img src="machine-300x300.jpg" data-src="machine-300x300.jpg" class="pcp-lazyload lazy-loaded" alt="" width="300" height="300" />
      </a>
    </div>
  </div>

  <h2 class="sp-pcp-title">
    <a href="/weights/" target="_blank">Bar- and dumbells</a>
  </h2>
  <div class="sp-pcp-post-content">
    <div class="sp-pcp-readmore">
      <a class="pcp-readmore-link" target="_blank" href="">Explore Now</a>
    </div>
  </div>
</div>

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