1.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> <!-- 生产环境版本，优化了尺寸和速度 --> <script src="https://cdn.jsdelivr.net/npm/vue"></script>
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"> <!--title本身的属性就是鼠标停留标签内容几秒显示message,通过v-bind将var中message内容绑定在标签内容上--> <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 app2 = 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 判断是指令，seen是true就展示，false就不展示 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> 复制代码
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"> // in todos是固定搭配，todo可以改变。 {{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>