File upload example for Quasar framework

form.js

// Component example

  /* template part */

        <q-file
          v-model="files"
          label="Load documents"
          square
          flat
          counter
          :counter-label="counterLabelFn"
          outlined
          use-chips
          multiple
          clearable
          accept=".csv,.txt,.xls,.xlsx,.doc,.docx,.pdf,.dbf,.zip,.rar,.7z,.jpg,.png,.gif"
          max-files="10"
          max-file-size="5120000" // 5 MB
          @rejected="onRejected"
        >
          <template v-slot:prepend>
            <q-icon name="attach_file" />
          </template>
        </q-file>


  /* script part */

  methods: {
    onSubmit (evt) {
      this.loading = true // add loading state to submit button
      const formData = new FormData()

      if (this.files && this.files.length > 0) {
        for (let i = 0; i < this.files.length; i++) {
          formData.append('files[' + i + ']', this.files[i])
        }
      }
      for (const [key, value] of Object.entries(this.form)) {
        formData.append(key, value)
      }

      this.$axios.get('/sanctum/csrf-cookie').then(response => {
        this.$axios({
          method: 'post',
          url: '/api/request',
          data: formData,
          headers: {
            'Content-Type': 'multipart/form-data'
          }
        })
          .then((response) => {
            this.loading = false

            this.$q.notify({
              color: 'positive',
              position: 'top',
              message: 'Request sent! We\'ll contact you soon.',
              icon: 'done'
            })
          })
          .catch(() => {
            this.loading = false

            this.$q.notify({
              color: 'negative',
              position: 'top',
              message: 'An error occurred',
              icon: 'report_problem'
            })
          })
      })
    },
              
    onRejected (entries) {
      if (entries.length > 0) {
        switch (entries[0].failedPropValidation) {
          case 'max-file-size':
            this.$q.notify({
              position: 'top',
              type: 'negative',
              message: 'File exceeds 5MB.'
            })

            break

          case 'max-files':
            this.$q.notify({
              position: 'top',
              type: 'negative',
              message: 'You can upload up to 10 files.'
            })

            break
        }
      }
    }

Upload.php.md

// Laravel 7 example

namespace App\Http\Controllers;

class Contact extends Controller
{
    // ...

    /**
     * @param Request $request
     */
    public function request(Request $request)
    {
        $data = [];
        $keys = ['name', 'email', 'phone', 'uid'];

        foreach ($keys as $key) {
            if (!$request->has($key)) {
                abort(403, 'Unauthorized action.');
            }

            if (!in_array($key, ['files', 'uid'])) {
                $data[ucfirst($key)] = $request->input($key, '');
            }
        }

        $data['files_path'] = '';
        // store uploaded files if any
        if ($request->files && count($request->files) > 0) {
            $upDir = 'uploads' . DIRECTORY_SEPARATOR . Carbon::now()->toDateString() . DIRECTORY_SEPARATOR . $request->uid;
            Storage::makeDirectory($upDir);
            /** @var UploadedFile $file */
            foreach ($request->files as $file) {
                $file->storeAs($upDir, $file->getClientOriginalName());
            }
            $data['files_path'] = $upDir;
        }
    }
    
    // ...
}

<template v-slot:prepend>
            <q-icon name="attach_file" />
          </template>

is this preview of selected image? It doesn't worked for me this way