
PASS XMLHttpRequest: response is plain text if responseType is set to an invalid string (arrayBuffer) 
PASS XMLHttpRequest: response is plain text if responseType is set to an invalid string (JSON) 
PASS XMLHttpRequest: response is plain text if responseType is set to an invalid string (glob) 
PASS XMLHttpRequest: response is plain text if responseType is set to an invalid string (txt) 
PASS XMLHttpRequest: response is plain text if responseType is set to an invalid string (text/html)