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