1502417 - Page doesn't load in Firefox, does in Chrome. Seems like XML parsing issue.

Status: RESOLVED INVALID

(Core :: XML, defect)

Description

[Kannan Vijayan [:djvj]]

This page's infographic loads quickly in Chrome.  Doesn't load in Firefox.

Looking at web console output shows the following:

XML Parsing Error: not well-formed
Location: https://eig.org/dci-maps-2018/data/2018/natl_counties.geojson
Line Number 1, Column 1:
natl_counties.geojson:1:1

XML Parsing Error: not well-formed
Location: https://eig.org/dci-maps-2018/data/2016/natl_counties.geojson
Line Number 1, Column 1: natl_counties.geojson:1:1


No such error shows on Chrome errors.

Comment 1

[Marcos Caceres [:marcosc]]

So, natl_counties.geojson, is JSON, but it's being treated as XML when XHR is called. Firefox is doing the right thing, by the looks of it.

To fix this, the response content-type needs to change to "text/json" and the site needs to make sure it's not using XHR in a way that would treat the JSON as XML. 

Unfortunately, the JS is all minified, so I could not actually check what's actually happening. 

An alternative would be to use the fetch API, which supports JSON parsing:
https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch

Without the un-mimnifed code, I can only assume this is invalid.