[Vue warn]: Property or method "myInputFrom" is not defined on the instance but referenced during render. Make sure that this property is reactive, either in the data option, or for class-based components, by initializing the property. See: https://v2.vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.

这个警告意味着在渲染期间引用了一个未定义的属性或方法"myInputFrom"。如果是在模板中使用了该属性或方法，请确保已经在Vue实例中声明了该属性或方法。要使该属性或方法成为响应式的，需要将其添加到Vue实例的data选项中，或者在基于类的组件中通过初始化该属性来实现响应式。您可以通过打开给出的链接来了解更多关于响应式属性的声明方式的信息。