工欲善其事

  
            let file;
            const properties = {type: 'text/plain'}, data = this.code;
            try {
                file = new File([data], "file.txt", properties);
            } catch (e) {
                file = new Blob(data, properties);
            }
            const formData = new FormData()
            formData.append('file', file, key)
            postAction(this.url.uploadUrl, formData).then(res => {
                if (res.success) {
                
                }
            });