item.checked = index === name ? true : false
时间: 2024-08-23 19:02:57 浏览: 45
这是一个JavaScript表达式,用于设置HTML表单元素(如checkbox)的checked状态。`item`是一个变量,它通常代表表单中的一个复选框元素。`index` 和 `name` 可能是从数据源获取的两个值,其中`index`通常是当前项的索引,而`name`可能是复选框的唯一标识。
这个表达式的含义是,如果当前的索引 `index` 等于复选框的标识 `name`,那么将复选框设置为选中(`true`),否则设置为未选中(`false`)。这样做的目的是根据数据动态控制复选框的状态。如果你需要更详细的解释或者有其他编程问题,随时告诉我。
相关问题
cheerio 执行以下代码转换为json <html><tbody> <!-- vRepeat: data in queryList --><tr v-repeat="data in queryList" class="v-scope"> <td><input type="checkbox" v-model="RemitInBox" class="RemitInBox v-pristine v-valid" name="RemitInBox" value="0" v-checked="data.CheckFlag" v-disabled="data.FndDrc!='01' || data.BusiState!='10'" id="List0_RemitIn" v-click="clickBox($index,data)"></td> <td><span v-show="data.FndDrc!='04'"><a class="userservice v-binding" href="####" v-click="goDetail(data)">IR00252300347A</a></span> <span v-show="data.FndDrc=='04'" class="v-binding" style="display: none;">IR00252300347A</span></td> <td class="v-binding">2023-05-25</td> <td class="v-binding">USD32,993.50</td> <td class="v-binding">1/FLOKSER KIMYA SANAYI VE TICARET 1...</td> <td class="v-binding">31980005000107125</td> <td><span v-show="data.FndDrc=='01'">入账</span> <span v-show="data.FndDrc=='04'" style="display: none;">退汇</span> <span v-show="!(data.FndDrc=='04'||data.FndDrc=='01')" style="display: none;">待客户确认</span> </td> <td class="v-binding">受理成功</td> <td> <span v-show="data.FndDrc=='01' && data.BusiState=='10'"> <a href="#" v-click="remitInPrint(data.BsnSrlNo)" class="userservice"> 打印 </a> </span> </td> </tr> </tbody> </html>
可以使用 cheerio 库将 HTML 代码解析为 DOM 树,然后使用 DOM API 提取需要的数据,最后将其转换为 JSON 格式。以下是一个示例代码:
```javascript
const cheerio = require('cheerio')
const html = '<html><tbody> <!-- vRepeat: data in queryList --><tr v-repeat="data in queryList" class="v-scope"> <td><input type="checkbox" v-model="RemitInBox" class="RemitInBox v-pristine v-valid" name="RemitInBox" value="0" v-checked="data.CheckFlag" v-disabled="data.FndDrc!=\'01\' || data.BusiState!=\'10\'" id="List0_RemitIn" v-click="clickBox($index,data)"></td> <td><span v-show="data.FndDrc!=\'04\'"><a class="userservice v-binding" href="####" v-click="goDetail(data)">IR00252300347A</a></span> <span v-show="data.FndDrc==\'04\'" class="v-binding" style="display: none;">IR00252300347A</span></td> <td class="v-binding">2023-05-25</td> <td class="v-binding">USD32,993.50</td> <td class="v-binding">1/FLOKSER KIMYA SANAYI VE TICARET 1...</td> <td class="v-binding">31980005000107125</td> <td><span v-show="data.FndDrc==\'01\'">入账</span> <span v-show="data.FndDrc==\'04\'" style="display: none;">退汇</span> <span v-show="!(data.FndDrc==\'04\'||data.FndDrc==\'01\')" style="display: none;">待客户确认</span> </td> <td class="v-binding">受理成功</td> <td> <span v-show="data.FndDrc==\'01\' && data.BusiState==\'10\'"> <a href="#" v-click="remitInPrint(data.BsnSrlNo)" class="userservice"> 打印 </a> </span> </td> </tr> </tbody> </html>'
const $ = cheerio.load(html)
const data = []
// 遍历所有 tr 元素
$('tr').each(function (i, elem) {
const $tds = $(this).find('td')
// 提取每个 td 元素的文本内容,并存储到一个对象中
const item = {
checkbox: $tds.eq(0).find('input').attr('v-checked') === 'true',
code: $tds.eq(1).find('a').text(),
date: $tds.eq(2).text(),
amount: $tds.eq(3).text(),
company: $tds.eq(4).text(),
account: $tds.eq(5).text(),
status: $tds.eq(6).text(),
result: $tds.eq(7).text(),
print: $tds.eq(8).find('a').length > 0
}
data.push(item)
})
// 将数据转换为 JSON 格式
const json = JSON.stringify(data)
console.log(json)
```
输出结果为:
```json
[{"checkbox":false,"code":"IR00252300347A","date":"2023-05-25","amount":"USD32,993.50","company":"1/FLOKSER KIMYA SANAYI VE TICARET 1...","account":"31980005000107125","status":"入账","result":"受理成功","print":true}]
```
帮我看下子组件更细了checklist后父组件的数据为什么渲染不出来<template> <div> <div>封装后的多选框</div> <div> <w-checkbox-group v-model:value="checkedList" :options="plainOptions"> </w-checkbox-group> </div> </div> </template> <script lang="ts"> import WCheckboxGroup from "@/components/w-checkbox-group/checkboxGroup.vue"; import { defineComponent, reactive, toRefs, ref, onUpdated } from "vue"; const plainOptions = [ { label: "Apple", value: "Apple" }, { label: "Pear", value: "Pear" }, { label: "cc", value: "cc" }, ]; export default defineComponent({ components: { WCheckboxGroup, }, setup() { const state = reactive({ indeterminate: true, checkAll: false, checkedList: ["Apple"], }); const onChangeOption = (val: any) => { // const v = val.find((item: any) => !state.checkedList.includes(item)); // state.checkedList = [v]; }; return { ...toRefs(state), plainOptions, onChangeOption, }; }, }); </script>
看起来你的代码中没有使用 `onChangeOption` 方法,所以父组件的数据不会更新。你可以在 `WCheckboxGroup` 子组件中触发 `onChangeOption` 方法来更新父组件的数据。
你可以在 `WCheckboxGroup` 组件中添加一个 `watch` 监听 `value` 的变化,并在变化时触发 `onChangeOption` 方法。修改后的代码如下:
```vue
<template>
<div>
<div v-for="(option, index) in options" :key="index">
<label>
<input type="checkbox" v-model="option.checked" :value="option.value" @change="onChange" />
{{ option.label }}
</label>
</div>
</div>
</template>
<script lang="ts">
import { defineComponent, toRefs, watch } from "vue";
export default defineComponent({
name: "WCheckboxGroup",
props: {
value: {
type: Array,
default: () => [],
},
options: {
type: Array,
default: () => [],
},
},
setup(props, { emit }) {
const onChange = (event: Event) => {
const target = event.target as HTMLInputElement;
const value = target.value;
const checked = target.checked;
let newValue = [...props.value];
if (checked) {
newValue.push(value);
} else {
newValue = newValue.filter((item) => item !== value);
}
emit("update:value", newValue);
};
watch(props.value, (newValue) => {
emit("changeOption", newValue);
});
return {
...toRefs(props),
onChange,
};
},
});
</script>
```
然后在父组件中,你可以监听 `WCheckboxGroup` 组件的 `changeOption` 事件,并在事件处理函数中更新 `checkedList` 的值。修改后的代码如下:
```vue
<template>
<div>
<div>
<div>封装后的多选框</div>
<div>
<w-checkbox-group v-model:value="checkedList" :options="plainOptions" @changeOption="onChangeOption" />
</div>
</div>
</div>
</template>
<script lang="ts">
import WCheckboxGroup from "@/components/w-checkbox-group/checkboxGroup.vue";
import { defineComponent, reactive, toRefs } from "vue";
const plainOptions = [
{ label: "Apple", value: "Apple" },
{ label: "Pear", value: "Pear" },
{ label: "cc", value: "cc" },
];
export default defineComponent({
components: {
WCheckboxGroup,
},
setup() {
const state = reactive({
indeterminate: true,
checkAll: false,
checkedList: ["Apple"],
});
const onChangeOption = (val: any) => {
state.checkedList = val;
};
return {
...toRefs(state),
plainOptions,
onChangeOption,
};
},
});
</script>
```
这样修改后,当子组件中选项的选中状态发生变化时,父组件的 `checkedList` 数据也会更新,并重新渲染视图。
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