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vue的computed没有引用就不生效怎么解决？

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vue的computed没有引用就不生效怎么解决？

我需要监听一个变量的变化，当这个变量变化时执行一些操作，但我现在用的computed（监听对象比较复杂watch实现不了），但是这个computed在视图部分不需要展示，没有引用就不生效，怎么让他生效？

现在想到个办法是将computed写在视图里并加个v-show=false,但感觉这种方法不太好，有没有更好的办法？


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watch可以配合着computed一起使用，watch监听computed中的变量


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