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组件的通信
2022-07-07 03:12:00 【要成为光的女人】
之前在写组件嵌套讲解的时候:
App组件时headers 组件的父组件;
一、在开发过程中,我们会经常遇到组件之间相互进行通信:
- 比如App 可能使用了很多个Header,每个地方的Header展示的内容不同,那么我们就需要使用者传递Header一些数据,让其进行展示;
- 又比如我们在Main中一次性请求了Banner数据和ProductList数据,那么就需要传递给它们进行展示
- 也有可能是子组件中发生了事件,需要由父组件来完成某些操作,那就需要子组件向父组件传递事件;
二、父子组件之间通信的方式
- 父组件传递给子组件:通过props属性;
- 子组件传递给父组件:通过$emit触发事件;
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