Cannot read property 'dispatch' of undefined

在你提供的代码中，报错的原因是`this.$store.dispatch`中的`this.$store`是undefined，而undefined没有dispatch属性，所以会出现"Cannot read property 'dispatch' of undefined"的错误。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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