sorry should have said:

  1. visit: https://www.htmlelements.com/demos/grid/datagrid-bind-to-json/
  2. scroll to bottom of page and notice the “Edit the codepen” button at the bottom of the page
  3. on windows, do window-key “R”
  4. enter the following command & open up a new window:    chrome.exe –user-data-dir=”C://Chrome dev session” –disable-web-security
  5. go back to first window, and click “Edit the codepen” at the bottom of the page
  6. QUICKLY grab the URL to the codepen (it will morph into another URL after  a moment or so)  repeat if necessary
  7. paste URL into the newly opened window from step 4
  8. change the dataSource value to the following:  dataSource: ‘//htmlelements.com/demos/scripts/beverages.json‘,

otherwise you get the CORS error.