效果示例
实现
原理
- 容器高度auto，由子元素撑开
- 右边列的内容实用绝对布局脱离文档流，使其不撑开容器
代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Two Column Popup Layout Demo</title>
</head>
<body
style="
font-family: sans-serif;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
margin: 0;
background-color: #f0f0f0;
"
>
<button
id="open-popup-btn"
style="padding: 10px 20px; font-size: 16px; cursor: pointer"
>
打开弹窗
</button>
<div
id="popup-overlay"
style="
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: rgba(0, 0, 0, 0.5);
display: flex;
justify-content: center;
align-items: center;
z-index: 1000;
"
>
<div
id="popup"
style="
background-color: white;
border-radius: 8px;
box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
width: 80%;
max-width: 800px;
max-height: 90vh;
display: flex;
flex-direction: column;
"
>
<div
class="popup-header"
style="
display: flex;
justify-content: space-between;
align-items: center;
padding: 10px 20px;
border-bottom: 1px solid #ccc;
flex-shrink: 0;
"
>
<h2 style="margin: 0">双列布局弹窗</h2>
<button
id="close-popup-btn"
style="
background: none;
border: none;
font-size: 24px;
cursor: pointer;
"
>
×
</button>
</div>
<div
class="popup-content"
style="flex-grow: 1; min-height: 0; display: flex"
>
<div
class="left-column"
style="
width: 50%;
padding: 20px;
border-right: 1px solid #ccc;
box-sizing: border-box;
"
>
<h4>左侧栏</h4>
<p>这一列的内容决定了弹窗的整体高度。</p>
<p>内容</p>
<p>内容</p>
<p>内容</p>
<p>内容</p>
<p>内容</p>
<p>内容</p>
<p>内容</p>
<p>内容</p>
<p>内容</p>
<p>内容</p>
<p>内容</p>
<p>内容</p>
<p>最后一行内容，撑开高度。</p>
</div>
<div style="position: relative; width: 50%">
<div
class="right-column"
style="
padding: 20px;
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
box-sizing: border-box;
overflow-y: auto;
"
>
<h4>右侧栏</h4>
<p>这一列的内容如果超出左侧的高度，就会出现滚动条。</p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
<p>
Sed do eiusmod tempor incididunt ut labore et dolore magna
aliqua.
</p>
<p>
Ut enim ad minim veniam, quis nostrud exercitation ullamco
laboris nisi ut aliquip ex ea commodo consequat.
</p>
<p>
Duis aute irure dolor in reprehenderit in voluptate velit esse
cillum dolore eu fugiat nulla pariatur.
</p>
<p>
Excepteur sint occaecat cupidatat non proident, sunt in culpa
qui officia deserunt mollit anim id est laborum.
</p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
<p>
Sed do eiusmod tempor incididunt ut labore et dolore magna
aliqua.
</p>
<p>
Ut enim ad minim veniam, quis nostrud exercitation ullamco
laboris nisi ut aliquip ex ea commodo consequat.
</p>
<p>
Duis aute irure dolor in reprehenderit in voluptate velit esse
cillum dolore eu fugiat nulla pariatur.
</p>
<p>
Excepteur sint occaecat cupidatat non proident, sunt in culpa
qui officia deserunt mollit anim id est laborum.
</p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
<p>
Sed do eiusmod tempor incididunt ut labore et dolore magna
aliqua.
</p>
<p>
Ut enim ad minim veniam, quis nostrud exercitation ullamco
laboris nisi ut aliquip ex ea commodo consequat.
</p>
<p>
Duis aute irure dolor in reprehenderit in voluptate velit esse
cillum dolore eu fugiat nulla pariatur.
</p>
<p>这一行是右侧的最后一行，用来确保内容足够长。</p>
</div>
</div>
</div>
</div>
</div>
<script>
document.addEventListener("DOMContentLoaded", () => {
const openBtn = document.getElementById("open-popup-btn");
const closeBtn = document.getElementById("close-popup-btn");
const popupOverlay = document.getElementById("popup-overlay");
// 默认隐藏弹窗
popupOverlay.style.display = "none";
openBtn.addEventListener("click", () => {
popupOverlay.style.display = "flex";
});
closeBtn.addEventListener("click", () => {
popupOverlay.style.display = "none";
});
popupOverlay.addEventListener("click", (event) => {
if (event.target === popupOverlay) {
popupOverlay.style.display = "none";
}
});
});
</script>
</body>
</html>