引入vue.js
尝试 Vue.js 最简单的方法是使用 Hello World 例子。你可以在浏览器新标签页中打开它，跟着例子学习一些基础用法。或者你也可以创建一个 .html 文件，然后通过如下方式引入 Vue：
<!-- 开发环境版本，包含了有帮助的命令行警告 -->
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>或者：
<!-- 生产环境版本，优化了尺寸和速度 -->
<script src="https://cdn.jsdelivr.net/npm/vue"></script>安装教程给出了更多安装 Vue 的方式。请注意我们不推荐新手直接使用 vue-cli，尤其是在你还不熟悉基于 Node.js 的构建工具时。
声明式渲染
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <div id="app"> {{ message }} </div> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> <script> var app = new Vue({ el: '#app', data: { message: 'Hello Vue!' } }) </script> </body> </html>
绑定事件 v-bind
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <div id="app-2"> <span v-bind:title="message"> // v-bind 绑定事件指令 鼠标悬停几秒显示此处动态绑定的提示信息！ </span> </div> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> <script> var app02 = new Vue({ el: '#app-2', data: { message: '页面加载于 ' + new Date().toLocaleString() } }) </script> </body> </html>
条件判断 v-if
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <div id="app-3"> <span v-if="seen"> // v-if 判断指令，seen是true就展示 看到我了！ </span> </div> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> <script> var app3 = new Vue({ el: "#app-3", data: { seen: true } }) </script> </body> </html>
循环 v-for
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <div id="app-4"> <ol> <li v-for="todo in todos"> {{todo.text}} </li> </ol> </div> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> <script> var app4 = new Vue({ el: "#app-4", data: { todos: [ {"text": "西瓜"}, {"text": "苹果"}, {"text": "西红柿"} ] } }) </script> </body> </html>
事件监听 v-on
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <div id="app-5"> <p> {{message}} </p> <button v-on:click="reverseMessage">反转信息</button> </div> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> <script> var app5 = new Vue({ el: "#app-5", data: { message: "Hello Vue!" }, methods: { reverseMessage: function () { this.message = this.message.split('').reverse().join('') } } }) </script> </body> </html>
监听输入框 v-model
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <div id="app-6"> <p> {{message}} </p> <input type="text" v-model="message"> </div> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> <script> var app6 = new Vue({ el: "#app-6", data: { message: "Hello Vue!" } }) </script> </body> </html>
Vue组件
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <div id="app-7"> <ol> <todo-item v-for="item in groceryList" v-bind:todo="item" v-bind:key="item.id" ></todo-item> </ol> </div> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> <script> Vue.component("todo-item", { // 模板组件 props: ['todo'], template: '<li>{{todo.text}}</li>' } ); var app7 = new Vue({ el: "#app-7", data: { groceryList: [ {id: 0, text: "苹果"}, {id: 1, text: "西瓜"}, {id: 2, text: "西红柿"} ] } }) </script> </body> </html>