Pass to vuejs variable from laravel filemanager?

Question

Vue.js

How to assign the value selected in the vue file manager to the image variable, with such an entry it is empty after selecting an image until you enter characters

<div class="s--header">
           <p>Аватар <span class="red-req">*</span></p>
           <a id="filemanager" data-input="thumbnail" data-preview="holder" class="btn-upload">
              Добавить аватар
           </a>
           <input type="text" v-model="image" name="avatar" id="thumbnail" value="">
           <img id="holder" src="">
        </div>

until you enter at least one character in the text field, the image value will not be updated