Vue.js 实例

本章节为大家介绍几个 Vue.js 实例，通过实例练习来巩固学到的知识点。

导航菜单实例

导航菜单

创建一个简单的导航菜单：

<
div

id
=
“
main
“
>

<!–
激活的菜单样式为 active 类
–>

<!–
为了阻止链接在点击时跳转，我们使用了 “prevent” 修饰符 (preventDefault 的简称)。
–>

<
nav

v-bind:class
=
“
active
“

v-on:click
.
prevent
>

<!–
当菜单上的链接被点击时，我们调用了 makeActive 方法, 该方法在 Vue 实例中创建。
–>

<
a

href
=
“
#
“

class
=
“
home
“

v-on:click
=
“
makeActive(‘home’)
“
>
Home
</
a
>

<
a

href
=
“
#
“

class
=
“
projects
“

v-on:click
=
“
makeActive(‘projects’)
“
>
Projects
</
a
>

<
a

href
=
“
#
“

class
=
“
services
“

v-on:click
=
“
makeActive(‘services’)
“
>
Services
</
a
>

<
a

href
=
“
#
“

class
=
“
contact
“

v-on:click
=
“
makeActive(‘contact’)
“
>
Contact
</
a
>

</
nav
>

<!–
以下 “active” 变量会根据当前选中的值来自动变换
–>

<
p
>
您选择了
<
b
>
{{active}} 菜单
</
b
>
</
p
>

</
div
>

<
script
>
// 创建一个新的 Vue 实例 var demo = new Vue({ // DOM 元素，挂载视图模型 el: ‘#main’, // 定义属性，并设置初始值 data: { active: ‘home’ }, // 点击菜单使用的函数 methods: { makeActive: function(item){ // 模型改变，视图会自动更新 this.active = item; } } });
</
script
>


尝试一下 »

编辑文本实例

文本编辑

点击指定文本编辑内容：

<!–
v-cloak 隐藏未编译的变量，直到 Vue 实例准备就绪。
–>

<!–
元素点击后 hideTooltp() 方法被调用
–>

<
div

id
=
“
main
“

v-cloak

v-on:click
=
“
hideTooltip
“
>

<!–
这是一个提示框 v-on:click.stop 是一个点击事件处理器，stop 修饰符用于阻止事件传递 v-if 用来判断 show_tooltip 为 true 时才显示
–>

<
div

class
=
“
tooltip
“

v-on:click
.
stop

v-if
=
“
show_tooltip
“
>

<!–
v-model 绑定了文本域的内容 在文本域内容改变时，对应的变量也会实时改变
–>

<
input

type
=
“
text
“

v-model
=
“
text_content
“

/>

</
div
>

<!–
点击后调用 “toggleTooltip” 方法并阻止事件传递
–>

<!–
“text_content” 变量根据文本域内容的变化而变化
–>

<
p

v-on:click
.
stop
=
“
toggleTooltip
“
>
{{text_content}}
</
p
>

</
div
>

<
script
>
var demo = new Vue({ el: ‘#main’, data: { show_tooltip: false, text_content: ‘点我，并编辑内容。’ }, methods: { hideTooltip: function(){ // 在模型改变时，视图也会自动更新 this.show_tooltip = false; }, toggleTooltip: function(){ this.show_tooltip = !this.show_tooltip; } } })
</
script
>


尝试一下 »

订单列表实例

订单列表

创建一个订单列表，并计算总价：

<
form

id
=
“
main
“

v-cloak
>

<
h1
>
Services
</
h1
>

<
ul
>

<!–
循环输出 services 数组, 设置选项点击后的样式
–>

<
li

v-for
=
“
service in services
“

v-on:click
=
“
toggleActive(service)
“

v-bind:class
=
“
{ ‘active’: service.active}
“
>

<!–
显示订单中的服务名，价格 Vue.js 定义了货币过滤器，用于格式化价格
–>
{{service.name}}
<
span
>
{{service.price | currency}}
</
span
>

</
li
>

</
ul
>

<
div

class
=
“
total
“
>

<!–
计算所有服务的价格，并格式化货币
–>
Total:
<
span
>
{{total() | currency}}
</
span
>

</
div
>

</
form
>

<
script
>
// 自定义过滤器 “currency”. Vue.filter(‘currency’, function (value) { return ‘$’ + value.toFixed(2); }); var demo = new Vue({ el: ‘#main’, data: { // 定义模型属性 the model properties. The view will loop // 视图将循环输出数组的数据 services: [ { name: ‘Web Development’, price: 300, active:true },{ name: ‘Design’, price: 400, active:false },{ name: ‘Integration’, price: 250, active:false },{ name: ‘Training’, price: 220, active:false } ] }, methods: { toggleActive: function(s){ s.active = !s.active; }, total: function(){ var total = 0; this.services.forEach(function(s){ if (s.active){ total+= s.price; } }); return total; } } });
</
script
>


尝试一下 »

搜索页面实例

搜索页面

在输入框输入搜索内容，列表显示配置的列表：

<
form

id
=
“
main
“

v-cloak
>

<
div

class
=
“
bar
“
>

<!–
searchString 模型与文本域创建绑定
–>

<
input

type
=
“
text
“

v-model
=
“
searchString
“

placeholder
=
“
输入搜索内容
“

/>

</
div
>

<
ul
>

<!–
循环输出数据
–>

<
li

v-for
=
“
article in filteredArticles
“
>

<
a

v-bind:href
=
“
article.url
“
>
<
img

v-bind:src
=
“
article.image
“

/>
</
a
>

<
p
>
{{article.title}}
</
p
>

</
li
>

</
ul
>

</
form
>

<
script
>
var demo = new Vue({ el: ‘#main’, data: { searchString: “”, // 数据模型，实际环境你可以根据 Ajax 来获取 articles: [ { “title”: “What You Need To Know About CSS Variables”, “url”: “https://www.runoob.com/css/css-tutorial.html”, “image”: “https://static.runoob.com/images/icon/css.png” }, { “title”: “Freebie: 4 Great Looking Pricing Tables”, “url”: “https://www.runoob.com/html/html-tutorial.html”, “image”: “https://static.runoob.com/images/icon/html.png” }, { “title”: “20 Interesting JavaScript and CSS Libraries for February 2016”, “url”: “https://www.runoob.com/css3/css3-tutorial.html”, “image”: “https://static.runoob.com/images/icon/css3.png” }, { “title”: “Quick Tip: The Easiest Way To Make Responsive Headers”, “url”: “https://www.runoob.com/css3/css3-tutorial.html”, “image”: “https://static.runoob.com/images/icon/css3.png” }, { “title”: “Learn SQL In 20 Minutes”, “url”: “https://www.runoob.com/sql/sql-tutorial.html”, “image”: “https://static.runoob.com/images/icon/sql.png” }, { “title”: “Creating Your First Desktop App With HTML, JS and Electron”, “url”: “https://www.runoob.com/js/js-tutorial.html”, “image”: “https://static.runoob.com/images/icon/html.png” } ] }, computed: { // 计算数学，匹配搜索 filteredArticles: function () { var articles_array = this.articles, searchString = this.searchString; if(!searchString){ return articles_array; } searchString = searchString.trim().toLowerCase(); articles_array = articles_array.filter(function(item){ if(item.title.toLowerCase().indexOf(searchString) !== -1){ return item; } }) // 返回过滤后的数据 return articles_array;; } } });
</
script
>


尝试一下 »

切换不同布局实例

切换不同布局

点击右上角的按钮来切换不同页面布局：

<
form

id
=
“
main
“

v-cloak
>

<
div

class
=
“
bar
“
>

<!–
两个按钮用于切换不同的列表布局
–>

<
a

class
=
“
list-icon
“

v-bind:class
=
“
{ ‘active’: layout == ‘list’}
“

v-on:click
=
“
layout = ‘list’
“
>
</
a
>

<
a

class
=
“
grid-icon
“

v-bind:class
=
“
{ ‘active’: layout == ‘grid’}
“

v-on:click
=
“
layout = ‘grid’
“
>
</
a
>

</
div
>

<!–
我们设置了两套布局页面。使用哪套依赖于 “layout” 绑定
–>

<
ul

v-if
=
“
layout == ‘grid’
“

class
=
“
grid
“
>

<!–
使用大图，没有文本
–>

<
li

v-for
=
“
a in articles
“
>

<
a

v-bind:href
=
“
a.url
“

target
=
“
_blank
“

rel
=
“
noopener noreferrer
“
>
<
img

v-bind:src
=
“
a.image.large
“

/>
</
a
>

</
li
>

</
ul
>

<
ul

v-if
=
“
layout == ‘list’
“

class
=
“
list
“
>

<!–
使用小图及标题
–>

<
li

v-for
=
“
a in articles
“
>

<
a

v-bind:href
=
“
a.url
“

target
=
“
_blank
“

rel
=
“
noopener noreferrer
“
>
<
img

v-bind:src
=
“
a.image.small
“

/>
</
a
>

<
p
>
{{a.title}}
</
p
>

</
li
>

</
ul
>

</
form
>

<
script
>
var demo = new Vue({ el: ‘#main’, data: { // 视图模型，可能的值是 “grid” 或 “list”。 layout: ‘grid’, articles: [{ “title”: “HTML 教程”, “url”: “https://www.runoob.com/html/html-tutorial.html”, “image”: { “large”: “https://static.runoob.com/images/mix/htmlbig.png”, “small”: “https://static.runoob.com/images/icon/html.png” } }, { “title”: “CSS 教程”, “url”: “https://www.runoob.com/css/css-tutorial.html”, “image”: { “large”: “https://static.runoob.com/images/mix/cssbig.png”, “small”: “https://static.runoob.com/images/icon/css.png” } }, { “title”: “JS 教程”, “url”: “https://www.runoob.com/js/js-tutorial.html”, “image”: { “large”: “https://static.runoob.com/images/mix/jsbig.jpeg”, “small”: “https://static.runoob.com/images/icon/js.png” } }, { “title”: “SQL 教程”, “url”: “https://www.runoob.com/sql/sql-tutorial.html”, “image”: { “large”: “https://static.runoob.com/images/mix/sqlbig.png”, “small”: “https://static.runoob.com/images/icon/sql.png” } }, { “title”: “Ajax 教程”, “url”: “https://www.runoob.com/ajax/ajax-tutorial.html”, “image”: { “large”: “https://static.runoob.com/images/mix/ajaxbig.png”, “small”: “https://static.runoob.com/images/icon/ajax.png” } }, { “title”: “Python 教程”, “url”: “https://www.runoob.com/pyhton/pyhton-tutorial.html”, “image”: { “large”: “https://static.runoob.com/images/mix/pythonbig.png”, “small”: “https://static.runoob.com/images/icon/python.png” } }] } });
</
script
>


尝试一下 »