use globals if they exist

Jake Champion · JakeChampion · commit dffc542fe714 · 2023-07-18T01:03:14.000+01:00
solves #860
diff --git a/fetch.js b/fetch.js
@@ -589,7 +589,7 @@ export function fetch(input, init) {
       }
     }
 
-    if (init && typeof init.headers === 'object' && !(init.headers instanceof Headers)) {
+    if (init && typeof init.headers === 'object' && !(init.headers instanceof Headers || (g.Headers && init.headers instanceof g.Headers))) {
       Object.getOwnPropertyNames(init.headers).forEach(function(name) {
         xhr.setRequestHeader(name, normalizeValue(init.headers[name]))
       })

Original file line number	Diff line number	Diff line change
`@@ -589,7 +589,7 @@ export function fetch(input, init) {`
`589`	`589`	`}`
`590`	`590`	`}`
`591`	`591`
`592`		`- if (init && typeof init.headers === 'object' && !(init.headers instanceof Headers)) {`
	`592`	`+ if (init && typeof init.headers === 'object' && !(init.headers instanceof Headers \|\| (g.Headers && init.headers instanceof g.Headers))) {`
`593`	`593`	`Object.getOwnPropertyNames(init.headers).forEach(function(name) {`
`594`	`594`	`xhr.setRequestHeader(name, normalizeValue(init.headers[name]))`
`595`	`595`	`})`