Property or method "myEvent" is not defined on the instance but referenced during render.

Property or method "myEvent" 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.

这个错误记录一下，主要是myEvent这个方法没有在methods里定义，却使用了，犯了低级错误，哈哈