axios的请求取消

    function fetchData () {
        //获取cancel的token
        const CancelToken = axios.CancelToken;
        const source = CancelToken.source();
        setTimeout(() => {
            //调用取消
            source.cancel();
        }, 10);
        this.$http.get(
            `list`,
            {
                //携带取消标识
                cancelToken: source.token,
                //上传进度条
                onUploadProgress (progressEvent) {
                    console.log(progressEvent.loaded);
                    console.log(progressEvent.total);
                },
                params: {
                    'page': 1,
                }
            }
        );
    }