下拉折叠效果
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.collapse-content {
max-height: 0;
overflow: hidden;
transition: max-height 0.2s ease-out;
}
</style>
</head>
<body>
<button class="collapse-button">Toggle Collapse</button>
<div class="collapse-content">
<p>This is some text that will be hidden or shown when the button is clicked.</p>
<p>This is some text that will be hidden or shown when the button is clicked.</p>
<p>This is some text that will be hidden or shown when the button is clicked.</p>
<p>This is some text that will be hidden or shown when the button is clicked.</p>
<p>This is some text that will be hidden or shown when the button is clicked.</p>
<p>This is some text that will be hidden or shown when the button is clicked.</p>
<p>This is some text that will be hidden or shown when the button is clicked.</p>
<p>This is some text that will be hidden or shown when the button is clicked.</p>
</div>
<script>
document.querySelector('.collapse-button').addEventListener('click', function () {
var content = document.querySelector('.collapse-content');
if (content.style.maxHeight) {
// 当点击时，如果section是显示的，则隐藏它
content.style.maxHeight = null;
} else {
// 当点击时，如果section是隐藏的，则显示它
content.style.maxHeight = content.scrollHeight + "px";
}
});
</script>
</body>
</html>
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