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什么是mixins(混入)?
mixins是对vue组件的一种扩展,将一些公用的常用数据或者方法,构建一个可被混入的数据结构,被不同的vue组件进行合并,就可以在不同的vue组件中使用相同的方法或者基础数据。
稍微有点理解vue混入的同学,可能会感到困惑,mixins和vue的公共组件或者vuex很相似。
mixins和vuex的区别。
vuex公共状态管理,在一个组件被引入后,如果该组件改变了vuex里面的数据状态,其他引入vuex数据的组件也会对应修改,所有的vue组件应用的都是同一份vuex数据。(在js中,有点类似于浅拷贝)
vue引入mixins数据,mixins数据或方法,在每一个组件中都是独立的,互不干扰的,都属于vue组件自身。(在js中,有点类似于深度拷贝)
mixins和公共组件的区别
通用的数据和方法,确实可以提出一个通用的组件,由父子组件传参的形式进行分享公用。
公共组件
子组件通过props接收来自父组件(公共组件)的参数或者方法,但vue不建议,子组件直接修改props接收到的父组件的数据。需要在子组件的data中或者computed中定义一个字段来接收。(有点麻烦)
公共组件最主要的作用还是复用相同的vue组件(有视图,有方法,有状态)。
mixins
如果只是提取公用的数据或者通用的方法,并且这些数据或者方法,不需要组件间进行维护,就可以使用mixins。(类似于js中封装的一些公用的方法)