引入vue插件,开发时直接使用<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
的方式来,这种称为cdn方式的引入,学习的时候用着很不错。
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>test1</title> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> </head> <body> <div id="app"> <h2>{{ message }} {{ name }}</h2> </div> <script type="text/javascript"> var app = new Vue({ el: "#app", data: { message: 'hello vue!', name: 'Vue' } }) </script> </body> </html>
效果如下所示:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>test1</title> <script src="https://unpkg.com/vue@next"></script> </head> <body> <div id="app"> </div> </body> <script> Vue.createApp({ //创建一个vue实例 // data函数负责返回数据,声明式的返回数据的方法 data(){ return { counter: 1 } }, //钩子函数 mounted(){ setInterval(()=>{ //下面两种用任何一种都可以 // this.counter += 1 this.$data.counter += 1 },1000) }, template: '<h2><div>{{ counter }}</div></h2>' //双大括号表示字面量 }).mount("#app") </script> </html>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>test1</title> <script src="https://unpkg.com/vue@next"></script> </head> <body> <div id="app"> </div> </body> <script> Vue.createApp({ data(){ return { content: "", setMeal: "真空套餐 帝王套餐 夏日套餐 学生套餐", isShowMeal: false } }, // methods声明一个事件绑定一个方法 methods: { welcomeBtnClick() { this.content = "欢迎你的光临,贵宾一位" }, byeBtnClick(){ this.content = "欢迎下次光临" }, showOrHidebtnClick(){ this.isShowMeal = !this.isShowMeal } }, template: ` <div> <div><h1>{{ content }}</h1></div> <button v-on:click="welcomeBtnClick"><h3>有顾客来</h3></button> <button v-on:click="byeBtnClick"><h3>顾客离开</h3></button> <div> <div v-if="isShowMeal">{{setMeal}}</div> <button v-on:click="showOrHidebtnClick">显示/隐藏套餐</button> </div> </div> ` }).mount("#app") </script> </html>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>test1</title> <script src="https://unpkg.com/vue@next"></script> </head> <body> <div id="app"> </div> </body> <script> Vue.createApp({ data(){ return{ list: [], inputValue: '' } }, methods: { handleAdditem(){ // push就是给数组增加数据的,类似python中的list.append()方法 this.list.push(this.inputValue) this.inputValue='' } }, template:` <div> //v-model多用于输入框 <input v-model="inputValue" /> <button v-on:click="handleAdditem">增加水果</button> <ul> <li v-for="(item,index) in list">[{{index}}]{{item}}</li> </ul> </div> ` }).mount('#app') </script> </html>