No 'access-control-allow-origin' Header Is Present On The Requested Resource. With Github Sites

http://kingdiepie.github.io/testing.html XMLHttpRequest cannot load https://docs.google.com/spreadsheets/d/1_4d-MPxTUOVZbxTOlhjXv1ebTlBPQ-_JrYUlS1rqX5Q/pub?output=csv. No 'Access-C

Solution 1:

From: https://developer.mozilla.org/en-US/docs/Web/HTTP/Access_control_CORS

A resource makes a cross-origin HTTP request when it requests a resource from a different domain than the one which the first resource itself serves. For example, an HTML page served from http://domain-a.com makes an src request for http://domain-b.com/image.jpg. Many pages on the web today load resources like CSS stylesheets, images and scripts from separate domains.

For security reasons, browsers restrict cross-origin HTTP requests initiated from within scripts. For example, XMLHttpRequest follows the same-origin policy. So, a web application using XMLHttpRequest could only make HTTP requests to its own domain. To improve web applications, developers asked browser vendors to allow XMLHttpRequest to make cross-domain requests.

The W3C Web Applications Working Group recommends the new Cross-Origin Resource Sharing (CORS) mechanism. CORS gives web servers cross-domain access controls, which enable secure cross-domain data transfers. Modern browsers use CORS in an API container - such as XMLHttpRequest - to mitigate risks of cross-origin HTTP requests.

The error message you receive: No 'Access-Control-Allow-Origin' header is present on the requested resource

Is telling you that Google does not allow the https://docs.google.com/spreadsheets/d/1_4d-MPxTUOVZbxTOlhjXv1ebTlBPQ-_JrYUlS1rqX5Q/pub?output=csv resource to be cross domain.