Added Javascript for displaying a preview in the form partial for the candidates edit/new

app/views/admin/candidates/_form.html.erb

@@ -3,8 +3,19 @@
 <%= simple_form_for([:admin, @candidate]) do |f| %>
   <%= f.association :position, label_method: :name, value_method: :id %>
   <%= f.input :first_name%>
-  <%= f.input :last_name%>
-  <%= f.input :image_link%>
+  <%= f.input :last_name %>
+
+  <div class="" id="box"></div>
+  <%= f.input :image_link, input_html:{id:"field"}%>
   <%= f.input :slogan%>
   <%= f.submit %>
+
+  <script>
+  field = document.getElementById("field");
+  box = document.getElementById("box");
+  field.addEventListener("keyup",function(f)
+  {
+  	box.innerHTML="<div style='background:url("+field.value+");  height:100px; width:100px; background-size:cover; border-radius:50%' ></div>"
+  })
+  </script>
 <% end %>