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使用axios的取消请求CanselToken

CanselToken中执行器函数的参数cb调用可以停止请求

const CanselToken = axios.CancelToken 
config.cancelToken = new CanselToken((cb => {
        const url = config.url
        store.commit('ADD_FN', { url: url, cb: cb })
    }))

做法:在axios拦截器中,把每次请求的url存起来到vuex中

响应拦截器,每次相应的url都删掉这个记录

在路由router路由器的.befoEach全局前置路由守卫中,每次跳转都执行vue中存储的拦截器cb。cb执行就会取消掉没有回来的请求

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