const News = () => { let wzxg = { bjtg: '性格乐观,处事爽快,乐于助人。' } return ( <span> {['(比劫)'].includes(ntgls) || ['(比劫)'].includes(ytgls) || ['(比劫)'].includes(stgls) ? wzxg.bjtg : null} </span> ) } 运行以上代码后,显示结果为空。ntgls、ytgls、stgls里明明就有(比劫),为何显示结果仍未空?代码出了什么问题?请改正并展示代码
时间: 2024-02-06 13:04:17 浏览: 20
根据代码,我们可以看出问题出在条件判断上,条件判断中使用了数组的 `includes` 方法,但是这些数组都没有被定义或者赋值。因此,条件判断不会被满足,导致最终结果为空。
在代码中,应该先定义或者赋值 `ntgls`、`ytgls`、`stgls` 这三个数组,然后再进行条件判断。以下是修改后的代码:
```
const News = () => {
const ntgls = ['(比劫)'];
const ytgls = ['(比劫)'];
const stgls = ['(比劫)'];
let wzxg = {
bjtg: '性格乐观,处事爽快,乐于助人。'
}
return (
<span>
{ntgls.includes('(比劫)') || ytgls.includes('(比劫)') || stgls.includes('(比劫)') ? wzxg.bjtg : null}
</span>
)
}
```
相关问题
<body> <div class="countdown"> <p class="next">今天是2023年4月24日</p> <p class="title">下课倒计时</p> <p class="clock"> <span id="hour">00</span> <i>:</i> <span id="minutes">25</span> <i>:</i> <span id="scond">20</span> </p> <p class="tips"> 现在是09:00:00 </p> </div> <script> </script> </body>补全以上的JavaScript代码
可以使用以下代码实现下课倒计时:
```
<script>
// 获取倒计时元素
const hourEl = document.getElementById('hour')
const minuteEl = document.getElementById('minutes')
const secondEl = document.getElementById('scond')
// 设定下课时间(24小时制)
const hour = 14
const minute = 25
const second = 0
// 更新倒计时函数
function updateCountdown() {
// 获取当前时间
const now = new Date()
const currentHour = now.getHours()
const currentMinute = now.getMinutes()
const currentSecond = now.getSeconds()
// 计算剩余时间
let remainingHour = hour - currentHour
let remainingMinute = minute - currentMinute
let remainingSecond = second - currentSecond
// 处理时间不足的情况
if (remainingSecond < 0) {
remainingSecond += 60
remainingMinute -= 1
}
if (remainingMinute < 0) {
remainingMinute += 60
remainingHour -= 1
}
if (remainingHour < 0) {
remainingHour += 24
}
// 更新倒计时元素
hourEl.innerText = remainingHour.toString().padStart(2, '0')
minuteEl.innerText = remainingMinute.toString().padStart(2, '0')
secondEl.innerText = remainingSecond.toString().padStart(2, '0')
}
// 初次更新倒计时
updateCountdown()
// 每秒更新倒计时
setInterval(updateCountdown, 1000)
</script>
```
其中,倒计时元素的 HTML 结构如下:
```
<div class="countdown">
<p class="next">今天是2023年4月24日</p>
<p class="title">下课倒计时</p>
<p class="clock">
<span id="hour">00</span>
<i>:</i>
<span id="minutes">25</span>
<i>:</i>
<span id="scond">20</span>
</p>
<p class="tips">
现在是09:00:00
</p>
</div>
```
其中,`hour`、`minutes`、`scond` 分别是小时、分钟和秒数的元素 ID。可以根据实际需要进行修改。
const activeIndex=Vue.ref(0); // console.log(activeIndex.valuea); function toggleActive(index){ if(activeIndex.value===index){ activeIndex.value=null; }else{ activeIndex.value=index; console.log(activeIndex); console.log(activeIndex.value); } const lis =document.querySelectorAll(".clearfix li") for(let i=0;i<lis.length; i++){ if(i!==index){ lis[i].classList.remove("noww"); } } }和<li v-for="(option,index) in conto" v-bind:key="index" :class="{'noww':activeIndex === index}" @click="toggleActive(index)" >{{option.category_title}} </li>和<div class="cont" v-show="activeIndex === 0" > <ul> <li v-for="option2 in cont" v-bind:key="option2" :class="parseInt(option2.stock) ===1?'olik':''" > <a :href="option2.source" target="_blank"> <div class="contimg" > <img :src="option2.bigpic" alt="{{option2.title}}"> </div> <div class="context"> <span> <img :src="option2.smallpic" alt="">{{option2.subtitle}}</span> <h4><span>{{option2.title}}</span></h4> <p>{{option2.summary}} </p> </div> </a> <!-- <div class="difficulty"> <div class="difficultbox"> <div class="modulus"> <div class="tit">难度系数</div> <div class="starsbox"> <div class="starsimg"><img src="../images/starsolik.png"></div> </div> </div> <div class="honor"> <div class="tts xuefen"><img src="../images/olikdegree.png"></div> <div class="tts certificate"><img src="../images/olikdegree2.png"></div> </div> </div> </div> --> </li> </ul> </div> <div class="cont" v-show="activeIndex.value === 1" > <ul> <li v-for="option2 in cont2" v-bind:key="option2" :class="parseInt(option2.stock) ===1?'olik':''" > <a :href="option2.source" target="_blank"> <div class="contimg" > <img :src="option2.bigpic" alt="{{option2.title}}"> </div> <div class="context"> <span> <img :src="option2.smallpic" alt="">{{option2.subtitle}}</span> <h4><span>{{option2.title}}</span></h4> <p>{{option2.summary}} </p> </div> </a> </li> </ul> </div>实现tab切换
要实现tab切换,你可以使用Vue的响应式数据和v-show指令。首先,你需要定义一个活动索引(activeIndex)的响应式变量,初始值为0。然后,你可以使用v-for指令循环渲染tab选项,并绑定点击事件。在点击事件中,你可以根据索引值切换活动索引的值,并根据活动索引的值来显示对应的内容。
下面是修改后的代码:
```html
<template>
<div>
<ul>
<li v-for="(option, index) in conto" :key="index" :class="{'noww': activeIndex === index}" @click="toggleActive(index)">
{{ option.category_title }}
</li>
</ul>
<div class="cont" v-show="activeIndex === 0">
<ul>
<li v-for="option2 in cont" :key="option2" :class="parseInt(option2.stock) === 1 ? 'olik' : ''">
<a :href="option2.source" target="_blank">
<div class="contimg">
<img :src="option2.bigpic" alt="{{option2.title}}">
</div>
<div class="context">
<span>
<img :src="option2.smallpic" alt="">{{option2.subtitle}}
</span>
<h4><span>{{option2.title}}</span></h4>
<p>{{option2.summary}}</p>
</div>
</a>
</li>
</ul>
</div>
<div class="cont" v-show="activeIndex === 1">
<ul>
<li v-for="option2 in cont2" :key="option2" :class="parseInt(option2.stock) === 1 ? 'olik' : ''">
<a :href="option2.source" target="_blank">
<div class="contimg">
<img :src="option2.bigpic" alt="{{option2.title}}">
</div>
<div class="context">
<span>
<img :src="option2.smallpic" alt="">{{option2.subtitle}}
</span>
<h4><span>{{option2.title}}</span></h4>
<p>{{option2.summary}}
</p>
</div>
</a>
</li>
</ul>
</div>
</div>
</template>
<script>
import { ref } from 'vue';
export default {
setup() {
const activeIndex = ref(0);
function toggleActive(index) {
if (activeIndex.value === index) {
activeIndex.value = null;
} else {
activeIndex.value = index;
}
}
return {
activeIndex,
toggleActive,
};
},
};
</script>
```
在上述代码中,使用了Vue的Composition API(setup函数)来定义activeIndex的响应式变量和toggleActive函数。activeIndex用于控制显示哪个内容,toggleActive用于切换活动索引的值。
请注意,你需要根据实际情况修改其他部分的代码,比如数据绑定和样式类名的逻辑。