<span style="cursor: text;" @click="handleRoute">{{ item.meta.title }}</span> 符合条件才有该点击事件,代码怎么写
时间: 2024-09-11 22:07:12 浏览: 43
在Vue框架中,你可以通过绑定`v-if`指令来确保只有当某个条件满足时,`<span>`标签上的点击事件`@click`才会被触发。以下是一个简单的示例代码:
```vue
<template>
<span style="cursor: text;" @click="handleRoute" v-if="condition">{{ item.meta.title }}</span>
</template>
<script>
export default {
data() {
return {
condition: true, // 假设这是控制点击事件是否触发的条件
item: {
meta: {
title: '示例标题'
}
}
};
},
methods: {
handleRoute() {
// 处理路由的函数
console.log('点击事件被触发');
}
}
}
</script>
```
在这个例子中,`condition`是一个布尔值,用来控制`<span>`标签是否渲染以及其上的点击事件是否有效。只有当`condition`为`true`时,`<span>`标签才会被渲染,同时绑定在上面的`handleRoute`函数才会在点击时执行。如果`condition`为`false`,则`<span>`标签不会渲染,点击事件也不会被触发。
相关问题
修改成轮播图效果!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title></title> <style type="text/css"> div{ height: 500px; background-color: skyblue; display: none; } </style> </head> <body> <input type="button" value="显示"> <input type="button" value="隐藏"> <input type="button" value="切换"> <div> <ul> <li><img src="../images/1.jpg"></li> <li><img src="../images/2.jpg"></li> <li><img src="../images/3.jpg"></li> <li><img src="../images/4.jpg"></li> <li><img src="../images/5.jpg"></li> <li><img src="../images/6.jpg"></li> </ul> </div> <script src="../jquery-3.7.0.js"></script> <script type="text/javascript"> $(function(){ $("input").eq(0).click(function(){ // sildeDown(null/speed,easing,.callback) / sildeUP $("div").slideDown("slow",function(){ console.log("111111") }) }) $("input").eq(1).click(function(){ // sildeDown(null/speed,easing,.callback) / sildeUP $("div").slideUp("slow",function(){ console.log("111111") }) }) }) </script> </body> </html>
将这段代码修改成轮播图效果需要引入第三方库或者自己手写轮播图的 JS 代码。以下是手写轮播图的示例代码:
```html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title></title>
<style type="text/css">
.slider {
width: 600px;
height: 300px;
margin: 0 auto;
overflow: hidden;
position: relative;
}
.slider ul {
width: 3000px;
height: 300px;
position: absolute;
left: 0;
top: 0;
}
.slider li {
float: left;
width: 600px;
height: 300px;
}
.slider img {
width: 100%;
height: 100%;
}
.slider .prev,
.slider .next {
width: 50px;
height: 50px;
background-color: black;
color: white;
text-align: center;
line-height: 50px;
font-size: 20px;
position: absolute;
top: 50%;
margin-top: -25px;
cursor: pointer;
}
.slider .prev {
left: 0;
}
.slider .next {
right: 0;
}
</style>
</head>
<body>
<div class="slider">
<ul>
<li><img src="../images/1.jpg" alt=""></li>
<li><img src="../images/2.jpg" alt=""></li>
<li><img src="../images/3.jpg" alt=""></li>
<li><img src="../images/4.jpg" alt=""></li>
<li><img src="../images/5.jpg" alt=""></li>
<li><img src="../images/6.jpg" alt=""></li>
</ul>
<span class="prev">❮</span>
<span class="next">❯</span>
</div>
<script src="../jquery-3.7.0.js"></script>
<script type="text/javascript">
$(function () {
var index = 0;
var timer = null;
var len = $(".slider li").length;
function showImg(index) {
$(".slider li").eq(index).fadeIn().siblings().fadeOut();
}
function autoPlay() {
timer = setInterval(function () {
index++;
if (index == len) {
index = 0;
}
showImg(index);
}, 2000);
}
$(".slider").hover(
function () {
clearInterval(timer);
},
function () {
autoPlay();
}
);
$(".prev").click(function () {
index--;
if (index == -1) {
index = len - 1;
}
showImg(index);
});
$(".next").click(function () {
index++;
if (index == len) {
index = 0;
}
showImg(index);
});
autoPlay();
});
</script>
</body>
</html>
```
这段代码实现了一个简单的轮播图,通过点击左右箭头或者自动播放来切换图片。其中,`.slider` 是轮播图的容器,`.slider ul` 是所有图片的容器,`.slider li` 是每张图片的容器,`.slider img` 是每张图片本身。点击左右箭头时,通过改变 `index` 的值来切换图片,`showImg()` 函数用于切换图片的动画效果。自动播放时,通过 `setInterval` 来循环切换图片。同时,也实现了当鼠标移到轮播图上时停止自动播放,鼠标移开后继续自动播放的功能。
代码纠错<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <script src="js/vue.js"></script> </head> <body> <div id="app"> <button @click="reset">还原</button> <div v-noData="{goodsList}"> <ul> <li><span>商品名称</span></li> <li v-for="(good,index) in goodsList" :key="index"> <span>{{good.name}}</span> <span>{{good.price|filterPrice}}</span> <span @click="delood(index)" style="color: red;" cursor:pointer>删除</span> </li> </ul> </div> </div> <script> const goodMixin={ date(){ return{ goodsList:[ {name:'电饭煲',price:200.1333232'}, {name:'电视机',price:2880.998395'}, {name:'电冰箱',price:650.2034'}, {name:'电脑',price:4032.9930'}, {name:'电磁炉',price:210.4322'}, ] } }, filters:{ filterPrice(value){ let newVualue =[] newVualue=value.toLocaleString().split('.') newVualue[0] = (newVualue[0]+'').replace(/\d{1,3}(?=(\d{3}+$)/g,'$&,') return newVualue[0] + '.' + newVualue[1].slice(0,2); } } new Vue({ el:'app', mixins:[goodsMixin], directives:{ inserted(el,binding){ const noData = document.createElement('dvi'); noDta.classList = 'noData' noData0innerHTML = '暂无数据'; el.appendChid(noData) const {goodsLIst} = binding.value; noData.style.display = goodsList.length ===0?'block':'none' }, update(le,binding){ const {goodsList} = binding.value; el.querSeletor('.noData').style.display = goodsList.lenght ===0? 'block':'none'; } } }, data(){ return{} } }) </script> <style> #app ul li{ list-style: none; display: flex; width: 400px; justify-content: space-between; } .noData{ width: 400px; text-align: center; margin-left: 40px; } </style> </body> </html>
代码中存在一些拼写错误和语法错误,请您修改如下:
1. 将 `const goodMixin={...}` 修改为 `const goodsMixin={...}`,拼写错误;
2. `date(){...}` 应该为 `data(){...}`,拼写错误;
3. `price:200.1333232'`、`price:2880.998395'`、`price:650.2034'`、`price:4032.9930'`、`price:210.4322'` 这几行的价格后面有多余的引号,应该去掉;
4. `el.appendChid(noData)` 应该为 `el.appendChild(noData)`,`appendChild` 拼写错误;
5. `noData0innerHTML` 应该为 `noData.innerHTML`,变量名拼写错误;
6. `el.querSeletor('.noData')` 应该为 `el.querySelector('.noData')`,方法名拼写错误;
7. `cursor:pointer` 应该为 `style="cursor:pointer"`,样式属性名称拼写错误。
修改后的代码如下:
```html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script src="js/vue.js"></script>
</head>
<body>
<div id="app">
<button @click="reset">还原</button>
<div v-noData="{goodsList}">
<ul>
<li><span>商品名称</span></li>
<li v-for="(good,index) in goodsList" :key="index">
<span>{{good.name}}</span>
<span>{{good.price|filterPrice}}</span>
<span @click="delGood(index)" style="color: red; cursor:pointer">删除</span>
</li>
</ul>
</div>
</div>
<script>
const goodsMixin={
data(){
return{
goodsList:[
{name:'电饭煲',price:200.13},
{name:'电视机',price:2880.99},
{name:'电冰箱',price:650.20},
{name:'电脑',price:4032.99},
{name:'电磁炉',price:210.43},
]
}
},
filters:{
filterPrice(value){
let newValue =[];
newValue=value.toLocaleString().split('.');
newValue[0] = (newValue[0]+'').replace(/\d{1,3}(?=(\d{3}+$)/g,'$&,');
return newValue[0] + '.' + newValue[1].slice(0,2);
}
},
methods:{
delGood(index){
this.goodsList.splice(index,1);
},
reset(){
this.goodsList=[
{name:'电饭煲',price:200.13},
{name:'电视机',price:2880.99},
{name:'电冰箱',price:650.20},
{name:'电脑',price:4032.99},
{name:'电磁炉',price:210.43},
]
}
},
directives:{
noData:{
inserted(el,binding){
const noData = document.createElement('div');
noData.classList = 'noData';
noData.innerHTML = '暂无数据';
el.appendChild(noData);
const {goodsList} = binding.value;
noData.style.display = goodsList.length ===0?'block':'none';
},
update(el,binding){
const {goodsList} = binding.value;
el.querySelector('.noData').style.display = goodsList.length ===0? 'block':'none';
}
}
}
};
new Vue({
el:'#app',
mixins:[goodsMixin],
data(){
return{}
}
});
</script>
<style>
#app ul li{
list-style: none;
display: flex;
width: 400px;
justify-content: space-between;
}
.noData{
width: 400px;
text-align: center;
margin-left: 40px;
}
</style>
</body>
</html>
```
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