Method A

scripts/new-relic.runtime.js:3318–3346

(e, n)

                }
              }
              function A(e, n) {
                e.params.status = n.status
                var i = (function (e, t) {
                  var r = e.responseType
                  return 'json' === r && null !== t
                    ? t
                    : 'arraybuffer' === r || 'blob' === r || 'json' === r
                    ? se(e.response)
                    : 'text' === r || '' === r || void 0 === r
                    ? se(e.responseText)
                    : void 0
                })(n, e.lastSize)
                if (
                  (i && (e.metrics.rxSize = i),
                  e.sameOrigin && n.getAllResponseHeaders().indexOf(Ne) >= 0)
                ) {
                  var o = n.getResponseHeader(Ne)
                  o &&
                    ((0, s.p)(
                      O.rs,
                      ['Ajax/CrossApplicationTracing/Header/Seen'],
                      void 0,
                      t.K7.metrics,
                      r
                    ),
                    (e.params.cat = o.split(', ').pop()))
                }
                e.loadCaptureCalled = !0
              }
              r.on('new-xhr', a),
                r.on('open-xhr-start', c),
                r.on('open-xhr-end', d),