CROS Request fails from CRM Web Resource

Hi,

I am facing issue in chrome while calling web api from crm html web resource using XMLHttpRequest. CRM 2016 and API deployed in the same server but different port numbers. So this is a cross domain request. I am able to get the response successfully from API using IE but not in chrome. Sadly our customer only use chrome. We have been struggling to find a solution for this for more than 1 month. Please suggest a solution for this.

Thanks.