在Vue中定义方法或者属性时，因为粗心疏忽可以能会报该错误

[Vue warn]: Property or method "search" 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.

属性或方法“search”不是在实例上定义的，而是在呈现期间引用的。通过初始化该属性，确保该属性是反应性的，无论是在data选项中，还是对于基于类的组件。

可以检查三个方面：

1.是否将该属性或方法放在 methods 中，尤其是methods 有没有写对。

2.在methods中是否定义了该方法。

3.如果方法中传了参数，这个参数有没有在 data 中 设置默认值

以上三方面没有解决：methods 中的方法的放的位置是否正确，括号太多了，可能发生嵌套错误。

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