如何更改默认的 Bootstrap 手风琴按钮？

Question

想知道是否有人知道如何更改 Bootstrap 4、5 手风琴的默认折叠按钮？

我想用 fontawesome 自定义它们。谢谢！

示例手风琴：

<div class="accordion" id="accordionExample">
  <div class="accordion-item">
    <h2 class="accordion-header" id="headingOne">
      <button class="accordion-button" type="button" data-bs-toggle="collapse" data-bs-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
        Accordion Item #1
      </button>
    </h2>
    <div id="collapseOne" class="accordion-collapse collapse show" aria-labelledby="headingOne" data-bs-parent="#accordionExample">
      <div class="accordion-body">
        <strong>This is the first item's accordion body.</strong> It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the <code>.accordion-body</code>, though the transition does limit overflow.
      </div>
    </div>
  </div>
  <div class="accordion-item">
    <h2 class="accordion-header" id="headingTwo">
      <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
        Accordion Item #2
      </button>
    </h2>
    <div id="collapseTwo" class="accordion-collapse collapse" aria-labelledby="headingTwo" data-bs-parent="#accordionExample">
      <div class="accordion-body">
        <strong>This is the second item's accordion body.</strong> It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the <code>.accordion-body</code>, though the transition does limit overflow.
      </div>
    </div>
  </div>
  <div class="accordion-item">
    <h2 class="accordion-header" id="headingThree">
      <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
        Accordion Item #3
      </button>
    </h2>
    <div id="collapseThree" class="accordion-collapse collapse" aria-labelledby="headingThree" data-bs-parent="#accordionExample">
      <div class="accordion-body">
        <strong>This is the third item's accordion body.</strong> It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the <code>.accordion-body</code>, though the transition does limit overflow.
      </div>
    </div>
  </div>
</div>

Answer 1

对于 Bootstrap 5 使用 CSS:

.accordion-button:not(.collapsed)::after {
  background-image: url("data:image/svg+xml,...");
}
.accordion-button::after {
  background-image: url("data:image/svg+xml,...");
}

（注意只能使用一张图片，因为默认CSS用rotate(180deg)旋转它）

有关使用 FA 的 caret-up 和 caret-down 的示例，请参阅 this JSFiddle。

对于 Bootstrap 4 -- Accordion 组件不使用图像。

但是如果您包含 FA 字体文件，您可以使用（“+”和“-”）：

.accordion .card-header:after {
  font-family: 'FontAwesome';
  content: '\f068';
  float: right;
}
.accordion .card-header.collapsed:after {
  content: '\f068';
}

如何更改默认的 Bootstrap 手风琴按钮？

How do I change the default Bootstrap accordion button?

bootstrap-4

bootstrap-5