axios 取消接口请求

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data数据: data() {     return {       source: ""     };   },   methods方法：   methods: {     sendGet() {       // 每次都生成一个 token，给这个接口       var source = axios.CancelToken.source();       this.source = source;         axios.get("http://127.0.0.1:7001/api/user", {           cancelToken: source.token         })         .then(res => {           console.log(res);         })         .catch(err => {           console.log(err);         });     },     // 取消请求;     cancelGet() {       this.source.cancel("cancel http");     }   },