Handling json content-type in IE11 response.

[joetidee]

A while ago we implemented a workaround for IE11 ignoring the application/json content-type (naugtur/xhr#123) by defaulting to parsing the response using .text():

const contentType = response.headers.get('content-type');
    const parsedResponseByContentType =
        contentType && contentType.includes('application/json') ? response.json() : response.text();

Is this still needed, or has the a polyfill been written to ensure that IE11 returns the raw response object instead of an empty string?

[dgraham]

This polyfill does not use responseType: json and just parses the text response body.