Cannot load twig templates via Ajax from Firefox

[shailpatels]

Latest versions of Firefox look like they need the XMLHttpRequest response type to be explicitly defined (in this case I think it should be set to "text"), otherwise, it'll think the response is XML and try to parse it which of course its not, twig.js is just pulling in text files to parse.

This causes a number of XML parsing errors whenever a Twig template get called with ajax.

Sample code

Twig.twig({
    id: "test",
    href: "/example.twig",
    async: true
});

var out = Twig.twig({ ref: "test"}).render({ });

Does the render function also send XMLHttpRequests ? It looks it does which is done synchronously which is deprecated and cannot have an explicit response type.

Chrome appears to be fine
Tested on Firefox 76.0.1 on MacOS & Firefox ESR Debian 10

[shailpatels]

Closed via #742