如图: 只要输出this或者window控制台直接报错, [Vue warn]: Property or method “toJSON” 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:

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解决方法:

查看是否安装调试工具Vconsole,注释掉即可
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