1. If it will be reported during the routing process
Cannot read properties of undefined (reading ‘install’)
It is because the version of vue-router does not match the version of vue
匹配规则
vue2--->vue-router3
vue3--->vue-router4vue报Cannot read properties of undefined (reading ‘install’)
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Origin blog.csdn.net/weixin_49662044/article/details/128837936
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