解释这行代码const newDescFormat = /<div class='ivu-card ivu-card-bordered temai_card'>/g; let match; let count = 0; let lastIndex = 0; while ((match = newDescFormat.exec(descFormat)) && count <= 6) { lastIndex = match.index; count++; } const result = descFormat.substring(0, lastIndex); return result;
时间: 2024-03-29 10:37:39 浏览: 7
这段代码使用正则表达式 `newDescFormat` 匹配字符串 `descFormat` 中的特定内容,并返回匹配到的结果。具体来说,它会从 `descFormat` 中查找 `<div class='ivu-card ivu-card-bordered temai_card'>` 这个字符串,并将其作为分界点,截取该字符串中分界点之前的部分(即代码中的 `result`)。该代码段还使用了一个 `while` 循环来迭代匹配到的结果,以便在匹配到第 6 个分界点时停止迭代。最后,代码返回截取得到的字符串 `result`。
相关问题
// 以下代码实现全选多选反选取消选择,具体实现代码? <div class="box"> <div class="list"> <div class="list-head"> <div class="check-box"> <el-checkbox v-model="checkAll">全选该页</el-checkbox> </div> <div class="title"> 需审核共<span class="red">15篇</span>内容 </div> <div class="list-btn"> <el-button size="medium" class="seachBtn">批量通过</el-button> </div> </div> <div class="list-box"> <div class="cell"> <div class="list-box-check"> <el-checkbox></el-checkbox> </div> <div class="text"> <div class="name">ZCH3021 财联社3月1日早报(周三)</div> <div class="p"> <div class="reason"> <span>过滤原因</span> <span>高敏感</span> </div> <div class="warehousing-time"> <span>入库时间</span> <span>2023-04-10 16:25:50</span> </div> </div> </div> </div> <div class="cell"> <div class="list-box-check"> <el-checkbox></el-checkbox> </div> <div class="text"> <div class="name">ZCH3021 财联社3月1日早报(周三)</div> <div class="p"> <div class="reason"> <span>过滤原因</span> <span>高敏感</span> </div> <div class="warehousing-time"> <span>入库时间</span> <span>2023-04-10 16:25:50</span> </div> </div> </div> </div> </div> </div> <div class="content"> </div> </div>
以下是实现全选、多选、反选和取消选择的具体代码:
1. 数据部分
```
data() {
return {
checkAll: false, // 是否全选
checkboxList: [] // 多选列表
}
},
```
2. 全选功能
```
methods: {
handleCheckAllChange(val) { // 全选或取消全选
this.checkboxList = val ? this.listData : [];
}
}
```
```
<el-checkbox v-model="checkAll" @change="handleCheckAllChange">{{ checkAll ? '取消全选' : '全选该页' }}</el-checkbox>
```
3. 多选功能
```
methods: {
handleCheckboxChange() { // 多选
const checkedCount = this.checkboxList.length;
this.checkAll = checkedCount === this.listData.length;
}
}
```
```
<el-checkbox v-model="checkboxList" @change="handleCheckboxChange"></el-checkbox>
```
4. 反选功能
```
methods: {
handleReverseSelection() { // 反选
this.checkboxList = this.listData.filter(item => !this.checkboxList.includes(item));
this.checkAll = this.checkboxList.length === this.listData.length;
}
}
```
```
<el-button size="medium" @click="handleReverseSelection">反选</el-button>
```
5. 取消选择功能
```
methods: {
handleClearSelection() { // 取消选择
this.checkAll = false;
this.checkboxList = [];
}
}
```
```
<el-button size="medium" @click="handleClearSelection">取消选择</el-button>
```
<div class="cart-thead"> <div class="t-checkbox"> <input type="checkbox" name="" id="" class="checkall"> 全选 </div> <div class="t-goods">商品</div> <div class="t-price">单价</div> <div class="t-num">数量</div> <div class="t-sum">小计</div> <div class="t-action">操作</div> </div>改成组件,把数据放在data中
好的,你可以参考下面的代码将这段 HTML 代码改成一个组件,并将数据放在 `data` 中:
```js
// CartThead.js
import React from 'react';
const data = {
checkbox: '全选',
goods: '商品',
price: '单价',
num: '数量',
sum: '小计',
action: '操作'
};
function CartThead() {
return (
<div className="cart-thead">
<div className="t-checkbox">
<input type="checkbox" name="" id="" className="checkall" /> {data.checkbox}
</div>
<div className="t-goods">{data.goods}</div>
<div className="t-price">{data.price}</div>
<div className="t-num">{data.num}</div>
<div className="t-sum">{data.sum}</div>
<div className="t-action">{data.action}</div>
</div>
);
}
export default CartThead;
```
然后在其他组件中引入 `CartThead` 组件即可:
```js
// OtherComponent.js
import React from 'react';
import CartThead from './CartThead';
function OtherComponent() {
return (
<div>
<CartThead />
{/* 其他内容 */}
</div>
);
}
export default OtherComponent;
```