有的项目会使用到附件上传，要求进度条和取消，之前没有使用axios写过，这次刚好碰到了，记录一下；

项目中版本

"axios": "^0.27.2",

使用

import axios from 'axios'
handleUploadAjax() {
    // 取消令牌生成器
    const CancelToken = axios.CancelToken;
    // 获取一个令牌对象, 调用source.cancel(),可以取消上传
    const source = CancelToken.source();
    let formdata = handleUploadFormdata({fileName: '', fileType: '', file: any});
     axios({
        url: 'url',
        headers: {
            'Authorization': `Bearer ${getUserToken() || ''}`,
            'Content-Type': 'multipart/form-data',
        },
        method: 'post',
        data: formdata,
        cancelToken: source.token,
        onUploadProgress: (event: any) => { // axios中自带获取文件上传进度条回调
            let percent = (event.loaded / event.total * 100).toFixed(2);
        }
    }).then((res) => {
    }).catch((err) => {
    });
}

FormData创建

handleUploadFormdata(params: {fileName: '', fileType:'', file: any}){
    const formdata: any = new FormData();
    const entries = Object.entries(params);
    for (const [key, value] of entries) {
    formdata.append(key, value);
    };
    return formdata;
}