Uploading multiple files using VueJS AJAX and Laravel 5.3

This might come later than you needed it, however it might still help people that will be looking for this.

First off, use axios library to send your files from your frontend to your backend.

Make sure you use FormData on Javascript side.

Here is a piece of code that will help you process your upload and send it to the server.

< input type = "file"
multiple = "multiple"
id = "attachments"
@change = "uploadFieldChange" >

    // This function will be called every time you add a file
    uploadFieldChange(e) {

        var files = e.target.files || e.dataTransfer.files;
        if (!files.length)
            return;

        for (var i = files.length - 1; i >= 0; i--) {
            this.attachments.push(files[i]);
        }

        // Reset the form to avoid copying these files multiple times into this.attachments
        document.getElementById("attachments").value = [];
    }

submit() {

    this.prepareFields();

    var config = {
        headers: {
            'Content-Type': 'multipart/form-data'
        },
        onUploadProgress: function (progressEvent) {
            this.percentCompleted = Math.round((progressEvent.loaded * 100) / progressEvent.total);
            this.$forceUpdate();
        }.bind(this)
    };

    // Make HTTP request to store announcement
    axios.post(this.settings.file_management.upload_files, this.data, config)
        .then(function (response) {
            console.log(response);
            if (response.data.success) {
                console.log('Successfull Upload');
                toastr.success('Files Uploaded!', 'Success');
                this.resetData();
            } else {
                console.log('Unsuccessful Upload');
                this.errors = response.data.errors;
            }
        }.bind(this)) // Make sure we bind Vue Component object to this funtion so we get a handle of it in order to call its other methods
        .catch(function (error) {
            console.log(error);
        });

}

Complete solution has a few more lines of code and is wrapped in a Laravel project.

You can find more details on Medium: https://medium.com/@adnanxteam/how-to-upload-multiple-files-via-ajax-vuejs-and-laravel-5-5-file-management-d218c3bbb71c

If you don't want yo use a plugin, it can be done using FormData.

Example:

// hmtl
<input type="file" multiple ref="file_input" @change="uploadFiles">


//Javascript
uploadFiles () {
  // get the input
  let files = this.$refs.file_input.files

  // assuming you are using the default lint you'll need to add these
  /* global FormData */
  /* eslint no-undef: 2 */
  let data = new FormData

  for (let i = 0; i < files.length; i++) {
     data.append('input_name[]', files[i])
  }

  // assuming you are using vue-resource
  this.$http('url', data).then(response => {
    // handle response
  }).catch(err => {
    // handle error
  })

}

Check the fiddle: https://jsbin.com/hozuwamoci/

First you shoud import axios like

import axios from 'axios';

in your app.js

then your your component look like

<template>
<div class="container">
    <div class="row">
        <div class="col-md-8 col-md-offset-2">
            <div class="panel panel-default">
                <div class="panel-heading">VUe Example Component</div>

                <div class="panel-body">
                        <legend>Upload form</legend>

                        <div class="form-group">
                            <label>Upload Files</label>
                            <input id="upload-file" type="file" multiple class="form-control" @change="fieldChange">
                        </div>




                        <button class="btn btn-primary" @click="uploadFile">Submit</button>

                </div>
            </div>
        </div>
    </div>
</div>
</template>

<script>
export default {
    data(){
      return {
          attachments:[],
          form: new FormData
      }
    },
    methods:{
        fieldChange(e){
            let selectedFiles=e.target.files;
            if(!selectedFiles.length){
                return false;
            }
            for(let i=0;i<selectedFiles.length;i++){
                this.attachments.push(selectedFiles[i]);
            }
            console.log(this.attachments);
        },
        uploadFile(){
            for(let i=0; i<this.attachments.length;i++){
                this.form.append('pics[]',this.attachments[i]);
            }
            const config = { headers: { 'Content-Type': 'multipart/form-data' } };
            document.getElementById('upload-file').value=[];
            axios.post('/upload',this.form,config).then(response=>{
                //success
                console.log(response);
            })
                .catch(response=>{
                    //error
                });
        }
    },
    mounted() {
        console.log('Component mounted.')
    }
}
</script>

this work for me