HTML模态框实现方法全解析

打开模态窗口



×
标题
这里是模态窗口的内容。

/* 遮罩层：默认隐藏 */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  justify-content: center;
  align-items: center;
  z-index: 1000;
}
/ 内容框 /
.modal-content {
background: #fff;
padding: 20px;
border-radius: 8px;
width: 400px;
max-width: 90%;
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
position: relative;
animation: modalFadeIn 0.3s ease-out;
}
/ 关闭按钮 /
.close-button {
position: absolute;
top: 10px;
right: 15px;
font-size: 28px;
color: #aaa;
cursor: pointer;
line-height: 1;
}
.close-button:hover {
color: #000;
}
/ 动画效果 /
@keyframes modalFadeIn {
from { opacity: 0; transform: scale(0.9); }
to { opacity: 1; transform: scale(1); }
}

// 获取元素
const modal = document.getElementById('modal');
const openButton = document.getElementById('openModal');
const closeButton = document.querySelector('.close-button');
// 打开模态窗口
openButton.addEventListener('click', () => {
modal.style.display = 'flex'; // 使用 flex 居中
});
// 关闭模态窗口
closeButton.addEventListener('click', () => {
modal.style.display = 'none';
});
// 点击遮罩层外部关闭
modal.addEventListener('click', (e) => {
if (e.target === modal) {
modal.style.display = 'none';
}
});
// 可选：按 Esc 键关闭
document.addEventListener('keydown', (e) => {
if (e.key === 'Escape' && modal.style.display === 'flex') {
modal.style.display = 'none';
}
});