Kutumia: Kichwa kirefu / Pianino ya mafanikio

Mafunzo ya kufanya akordi (kina kuliko kina).

Kufanya akordi

Taratibu ya kwanza - Ongeza HTML:

<button class="accordion">Section 1</button>
<div class="panel">
  <p>Lorem ipsum...</p>
</div>
<button class="accordion">Section 2</button>
<div class="panel">
  <p>Lorem ipsum...</p>
</div>
<button class="accordion">Section 3</button>
<div class="panel">
  <p>Lorem ipsum...</p>
</div>

Taratibu ya pili - Ongeza CSS:

Kuzingatia mtindo wa akordi

/* Kuzingatia mtindo wa buttone za kufungua na kufichukia peneza la akordi */
.accordion {
  background-color: #eee;
  color: #444;
  cursor: pointer;
  padding: 18px;
  width: 100%;
  text-align: left;
  border: none;
  outline: none;
  transition: 0.4s;
}
/* Ikiwa buttone inatumika (kwa JS kongeza kikla "active"), ongeza rangi ya mbali, na wakati wa kumzunguka kwenye kwa kina (kumzunguka) */
.active, .accordion:hover {
  background-color: #ccc;
}
/* Ongeza mtindo wa peneza la peneza la akordi. Kugombea: ni kizuri kwa uharibifu */
.panel {
  padding: 0 18px;
  background-color: white;
  display: none;
  overflow: hidden;
}

Taratibu ya tatu - Ongeza JavaScript:

var acc = document.getElementsByClassName("accordion");
var i;
for (i = 0; i < acc.length; i++) {
  acc[i].addEventListener("click", function() {
    /* Kichukua na kufichukia kikla "active", kwa kuzingatia buttone za kipangilio cha kichwa cha kipangilio */
    this.classList.toggle("active");
    /* Kichukua na kufichukia peneza la kichwa cha kipangilio kinachotengeneza kwa msingi wa kipangilio */
    var panel = this.nextElementSibling;
    if (panel.style.display === "block") {
      panel.style.display = "none";
    } else {
      panel.style.display = "block";
    }
  });
}

Jifunze tena

动画手风琴（向下滑动）

要制作动画手风琴，请向面板类添加 max-height: 0、overflow: hidden 以及 max-height 属性的过渡效果。

然后，使用 JavaScript 根据不同屏幕尺寸的面板高度来计算并设置 max-height，以实现内容的向下滑动效果：

<style>
.panel {
  padding: 0 18px;
  background-color: white;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease-out;
}
</style>
<script>
var acc = document.getElementsByClassName("accordion");
var i;
for (i = 0; i < acc.length; i++) {
  acc[i].addEventListener("click", function() {
    this.classList.toggle("active");
    var panel = this.nextElementSibling;
    if (panel.style.maxHeight) {
      panel.style.maxHeight = null;
    } else {
      panel.style.maxHeight = panel.scrollHeight + "px";
    }
  });
}
</script>

Jifunze tena

添加图标

在每个按钮上添加一个符号，以指示可折叠内容是否打开或关闭：

.accordion:after {
  content: '\02795'; /* “加号”（+）的 Unicode 字符 */
  font-size: 13px;
  color: #777;
  float: right;
  margin-left: 5px;
}
.active:after {
  content: "\2796"; /* “减号”（-）的 Unicode 字符 */
}

Jifunze tena