时间:2020-11-21 14:30:54 | 栏目:vue | 点击:次
1、props通信
注意:DOM模板的驼峰命名props要转为短横分割命名。
<!DOCTYPE html> <html lang="zh"> <head> <meta charset="UTF-8" /> <title>Vue</title> </head> <body> <div id="app"> <my-component message='来自父组件的数据' warning-text="提示信息"></my-component> </div> <script src="https://cdn.bootcss.com/vue/2.5.9/vue.min.js"></script> <script type="text/javascript"> Vue.component('my-component', { template: '<div>{{warningText}}:{{message}}</div>', props: ['message', 'warningText'] }) new Vue({ el: "#app" }) </script> </body> </html>
传递动态数据(v-bind):
<!DOCTYPE html> <html lang="zh"> <head> <meta charset="UTF-8" /> <title>Vue</title> </head> <body> <div id="app"> <input type="text" v-model="parentMessage" /> <my-component :message='parentMessage'></my-component> </div> <script src="https://cdn.bootcss.com/vue/2.5.9/vue.min.js"></script> <script type="text/javascript"> Vue.component('my-component', { template: '<div>{{message}}</div>', props: ['message'] }) new Vue({ el: "#app", data: { parentMessage: '' }//前端全栈开发交流群: })//866109638 </script>//帮助1-3年工作人员 </body>//突破技术瓶颈,提升思维能力 </html>
2、单向数据流
(1)子组件保存父组件传递过来的值,在子组件自己的作用域下修改和使用。
<!DOCTYPE html> <html lang="zh"> <head> <meta charset="UTF-8" /> <title>Vue</title> </head> <body> <div id="app"> <my-component :init-count='1'></my-component> </div> <script src="https://cdn.bootcss.com/vue/2.5.9/vue.min.js"></script> <script type="text/javascript"> Vue.component('my-component', { template: '<div>{{initCount}}</div>', props: ['initCount'], data: function() { return this.initCount } }) new Vue({ el: "#app" }) </script> </body> </html>
(2)使用计算属性
<!DOCTYPE html> <html lang="zh"> <head> <meta charset="UTF-8" /> <title>Vue</title> </head>//前端全栈交流学习圈: //866109386,帮助1-3年前端人员 <body>//突破技术瓶颈,提升思维能力 <div id="app"> <my-component :width='100'></my-component> </div> <script src="https://cdn.bootcss.com/vue/2.5.9/vue.min.js"></script> <script type="text/javascript"> Vue.component('my-component', { template: '<div :style="style">组件内容</div>', props: ['width'], computed: { style: function() { return { width: this.width + 'px' } } } }) new Vue({ el: "#app" }) </script> </body> </html>