Hi, 
I found this code to add restricted to filed and make it accept only numeric
https://jsfiddle.net/emkey08/zgvtjc51

But filed should have ID "getElementById", How can add ID without losing any change when update the plugin, I don't need to do that direct inside the core

Thanks for you

Hi, 
can you please add this code to core file please in page  easy-appointments/src/templates/ea_bootstrap.tpl.php
Line : 70
add id="<%= item.slug %>"

Start your code here

<input class="form-control custom-field" maxlength="499" type="text" name="<%= item.slug %>" id="<%= item.slug %>" placeholder="<%= _.escape(item.mixed) %>" value="<%- item.default_value %>"  

Hi thanks for suggestion. It is added and will be in next release :) Best regards, Nikola