以下是一个功能完善的模态窗口类的封装,使用纯JavaScript编写:
class Modal {
constructor(options = {}) {
this.options = {
title: options.title || '提示',
content: options.content || '',
width: options.width || '400px',
buttons: options.buttons || [],
maskClosable: options.maskClosable !== undefined ? options.maskClosable : true
};
this.modal = null;
this.mask = null;
}
// 创建模态窗口
createModal() {
// 创建遮罩层
this.mask = document.createElement('div');
this.mask.className = 'modal-mask';
this.mask.style.position = 'fixed';
this.mask.style.top = '0';
this.mask.style.left = '0';
this.mask.style.right = '0';
this.mask.style.bottom = '0';
this.mask.style.backgroundColor = 'rgba(0, 0, 0, 0.5)';
this.mask.style.zIndex = '1000';
// 创建模态窗口容器
this.modal = document.createElement('div');
this.modal.className = 'modal-container';
this.modal.style.position = 'fixed';
this.modal.style.top = '50%';
this.modal.style.left = '50%';
this.modal.style.transform = 'translate(-50%, -50%)';
this.modal.style.backgroundColor = '#fff';
this.modal.style.width = this.options.width;
this.modal.style.zIndex = '1001';
this.modal.style.borderRadius = '5px';
this.modal.style.boxShadow = '0 4px 12px rgba(0, 0, 0, 0.15)';
this.modal.style.overflow = 'hidden';
// 创建模态窗口头部
const header = document.createElement('div');
header.className = 'modal-header';
header.style.display = 'flex';
header.style.justifyContent = 'space-between';
header.style.alignItems = 'center';
header.style.padding = '15px 20px';
header.style.borderBottom = '1px solid #eee';
const title = document.createElement('h3');
title.style.margin = '0';
title.style.fontWeight = '500';
title.textContent = this.options.title;
const closeBtn = document.createElement('span');
closeBtn.className = 'modal-close';
closeBtn.style.cursor = 'pointer';
closeBtn.style.fontSize = '18px';
closeBtn.textContent = '×';
closeBtn.addEventListener('click', () => this.close());
header.appendChild(title);
header.appendChild(closeBtn);
// 创建模态窗口主体
const body = document.createElement('div');
body.className = 'modal-body';
body.style.padding = '20px';
body.innerHTML = this.options.content;
// 创建模态窗口底部
const footer = document.createElement('div');
footer.className = 'modal-footer';
footer.style.padding = '15px 20px';
footer.style.borderTop = '1px solid #eee';
footer.style.display = 'flex';
footer.style.justifyContent = 'flex-end';
// 添加按钮
this.options.buttons.forEach(button => {
const btn = document.createElement('button');
btn.style.marginLeft = '10px';
btn.style.padding = '6px 15px';
btn.style.border = 'none';
btn.style.borderRadius = '3px';
btn.style.cursor = 'pointer';
btn.textContent = button.text;
btn.style.backgroundColor = button.bgColor || '#f0f0f0';
btn.style.color = button.color || '#333';
btn.addEventListener('click', button.callback);
footer.appendChild(btn);
});
// 将各部分添加到模态窗口
this.modal.appendChild(header);
this.modal.appendChild(body);
if (this.options.buttons.length > 0) {
this.modal.appendChild(footer);
}
// 将遮罩层和模态窗口添加到body
document.body.appendChild(this.mask);
document.body.appendChild(this.modal);
// 遮罩层点击关闭
if (this.options.maskClosable) {
this.mask.addEventListener('click', () => this.close());
}
}
// 打开模态窗口
open() {
this.createModal();
}
// 关闭模态窗口
close() {
if (this.modal) {
document.body.removeChild(this.modal);
this.modal = null;
}
if (this.mask) {
document.body.removeChild(this.mask);
this.mask = null;
}
}
// 添加按钮
addButton(text, callback, bgColor = '#f0f0f0', color = '#333') {
this.options.buttons.push({
text,
callback,
bgColor,
color
});
return this;
}
}
使用示例
// 创建模态窗口实例
const modal = new Modal({
title: '用户信息',
content: '<p>用户名:张三</p><p>邮箱:zhangsan@example.com</p>',
width: '500px',
buttons: [
{
text: '确定',
callback: () => {
alert('确定按钮被点击');
modal.close();
},
bgColor: '#2196F3',
color: '#fff'
},
{
text: '取消',
callback: () => {
alert('取消按钮被点击');
modal.close();
},
bgColor: '#f44336',
color: '#fff'
}
],
maskClosable: true
});
// 打开模态窗口
modal.open();
// 或者动态添加按钮
const modal2 = new Modal({
title: '提示',
content: '这是一个动态添加按钮的模态窗口'
});
modal2.addButton('关闭', () => modal2.close(), '#333', '#fff');
modal2.open();
功能说明
-
基本功能:
- 显示和关闭模态窗口
- 自定义标题和内容
- 设置模态窗口宽度
-
按钮支持:
- 添加多个按钮
- 为每个按钮设置文本、点击事件、背景色和文字颜色
-
遮罩层功能:
- 点击遮罩层关闭模态窗口(可配置)
-
样式:
- 简洁美观的默认样式
- 圆角和阴影效果提升视觉体验
这个模态窗口类可以根据需要进一步扩展,比如添加动画效果、支持HTML内容、增加模态窗口居中等功能。