Question

我想默认不使用jQuery或boostrap的情况下打开此手风琴中的第一个标签。

代码：-

https://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_accordion

谢谢！

Answer 1

将.active类添加到按钮，并使用display: block;为面板设置样式。

<button class="accordion active">Section 1</button>
<div class="panel" style="display: block;">

完整的工作代码：

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
.accordion {
    background-color: #eee;
    color: #444;
    cursor: pointer;
    padding: 18px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 15px;
    transition: 0.4s;
}

.active, .accordion:hover {
    background-color: #ccc; 
}

.panel {
    padding: 0 18px;
    display: none;
    background-color: white;
    overflow: hidden;
}
</style>
</head>
<body>

<h2>Accordion</h2>

<button class="accordion active">Section 1</button>
<div class="panel" style="display: block;">
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p>
</div>

<button class="accordion">Section 2</button>
<div class="panel">
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p>
</div>

<button class="accordion">Section 3</button>
<div class="panel">
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p>
</div>

<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.display === "block") {
            panel.style.display = "none";
        } else {
            panel.style.display = "block";
        }
    });
}
</script>

</body>
</html>

我想使此手风琴中的第一个标签默认打开-没有jQuery或引导程序？

1 个答案: