vue used formdata upload files

Vue then use the file upload function; originally a small thing; if we use online components, they would be wasteful,

But then upload files using formdata when the error occurs; if the append method formdata, the required fields and then merge files together, you can not get back to other fields outside the file; upload failed due;

Solution: formdata only to save the file; not append other parameters; other parameters suffix to the rear url address; so you can avoid this problem

E.g:

 var formData=new FormData();
 formData.append('image',files[0]);
            formData.append('act',"upload_file");
            capis.upLoadImgs(formData,header).then(data=>{
                if(data.status=='success'){
                    this.upLoadImgsList.push(data.res[1]);
                    if(this.subParms.attachments.length!=0){
                        this.subParms.attachments=this.subParms.attachments.split(',');
                    }
                    this.subParms.attachments.push(data.res[0]);
                    this.subParms.attachments= this.subParms.attachments.join(',');
                    this.$vux.toast.show({
                        text: '上传成功！',
                        type:'success'
                    })
                    
                }the else {
                     the this . $ vux.toast.show ({ 
                        text: ' upload. Please try again! ' , 
                        type: ' The warn ' 
                    }) 
                } 
            .}) the catch (ERR => { 
                the console.log ( ' Fail: ' + ERR); 
            })