CSS实现优惠券透明圆形镂空打孔效果等能力学习
前言:无他,仅供学习记录,通过一个简单的优惠券Demo实践巩固CSS知识。
本次案例主要学习或巩固一下几点:
- 实现一个简单的Modal;
- 如何进行复制文本到粘贴板;
- 在不使用UI的svg图片的情况下,如何用CSS实现类优惠券打孔的样式;
- createPortal的使用实践;
优惠券例子
- 分上中下三层,父层级不设置底色,上下两层设置底色;
- 中间打孔那层,定高度(如48px),不设置任何底色,使镂空穿透,且超出隐藏;
- 打孔那层,然后通过伪元素before和after,设置相同宽高,描圆;
- 打孔那层中间部分,通过border设置底色进行填充,然后通过定位使其到两边即可;
- 至于分割线就比较简单了,实现方式很多,这里不作解析;
代码
index.tsx
import { Button } from 'antd-mobile';
import { createPortal } from 'react-dom';
import { useCallback, useState } from 'react';
import { copyText } from '@/utils';
import styles from './index.module.less';
interface CouponProps {
couponData?: {
couponName: string;
couponCode: string;
expirationDate: string;
threshold: string;
};
}
const Coupon = (props: CouponProps) => {
const {
couponName = '优惠券名称',
couponCode = '1234567890',
expirationDate = '2024-10-10 10:10:10',
threshold = '部分男鞋用品可用'
} = props?.couponData || {};
const [visible, setVisible] = useState<boolean>(false);
const open = useCallback(() => {
setVisible(true);
document.body.style.overflow = 'hidden'; // 禁用滚动
}, []);
const close = useCallback(() => {
setVisible(false);
document.body.style.overflow = 'auto'; // 恢复滚动
}, []);
return (
<>
<Button color='primary' onClick={open}>
查看优惠券
</Button>
{visible
? createPortal(
<div className={styles.myCouponDialog}>
<div className={styles.mask} onClick={close} />
<div className={styles.dialogContent}>
<div className={styles.couponHeader}>
<div className={styles.couponName}>{couponName}</div>
<div className={styles.couponCode}>
<span>券码:{couponCode}</span>
<span onClick={() => copyText(couponCode)} className={styles.btn}>
复制
</span>
</div>
</div>
<div className={styles.couponCenter}>
<div />
</div>
<div className={styles.couponBottom}>
<div style={{ marginBottom: '6px' }}>
<span>有效期: </span>
<span>{expirationDate}</span>
</div>
<div>
<span>使用门槛: </span>
<span>{threshold}</span>
</div>
</div>
</div>
</div>,
document.getElementById('root') || document.body
)
: null}
</>
);
};
export default Coupon;
index.module.less
.myCouponDialog {
z-index: 999;
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
display: flex;
justify-content: center;
align-items: center;
overflow: hidden;
.mask {
z-index: 1;
position: absolute;
background-color: rgba(0, 0, 0, 0.5);
top: 0;
left: 0;
width: 100%;
height: 100%;
}
.dialogContent {
z-index: 2;
width: 80vw;
border-radius: 4px;
overflow: hidden;
box-sizing: border-box;
.couponHeader {
padding: 6px 24px;
background-color: #fff;
.couponName {
font-size: 18px;
font-weight: 600;
display: flex;
justify-content: center;
align-items: center;
padding: 24px 0;
}
.couponCode {
display: flex;
align-items: center;
justify-content: space-between;
padding: 6px 16px;
border: 1px solid rgba(0, 0, 0, 0.3);
border-radius: 4px;
margin-top: 4px;
.btn {
color: #06b752;
}
}
}
.couponCenter {
width: 100%;
height: 48px;
position: relative;
overflow: hidden;
& > div {
position: absolute;
top: 50%;
left: 18px;
right: 18px;
z-index: 2;
height: 0;
border-bottom: 1px dotted rgba(0, 0, 0, 0.5);
}
&::before,
&::after {
z-index: 1;
content: '';
border: calc(50vw - 18px) solid #fff;
position: absolute;
width: 36px;
height: 36px;
border-radius: 50%;
top: 50%;
}
&::before {
left: -50vw;
transform: translateY(-50%);
}
&::after {
right: -50vw;
transform: translateY(-50%);
}
}
.couponBottom {
background-color: #fff;
padding: 0 24px 24px;
& > div {
display: flex;
align-items: center;
justify-content: space-between;
& > span:first-child {
color: rgba(0, 0, 0, 0.5);
}
}
}
}
}
utils
import { Toast } from 'antd-mobile';
/**
* 复制文本
* @param text
* @returns
*/
export const copyText = (text: string) => {
return new Promise(resolve => {
Toast.show({ content: '复制成功' });
if (navigator.clipboard?.writeText) {
return resolve(navigator.clipboard.writeText(text));
}
// 创建输入框
const textarea = document.createElement('textarea');
document.body.appendChild(textarea);
// 隐藏此输入框
textarea.style.position = 'absolute';
textarea.style.clip = 'rect(0 0 0 0)';
// 赋值
textarea.value = text;
// 选中
textarea.select();
// 复制
document.execCommand('copy', true);
textarea.remove();
return resolve(true);
});
};
效果
备注:样式个人随便搞的,不必理会