Reject upload when status code is faulty

scripts/Utils/index.ts

@@ -4,5 +4,5 @@ export * from "./findAll"
 export * from "./plural"
 export * from "./requestIdleCallback"
 export * from "./swapElements"
-export * from "./fetchWithProgress"
+export * from "./uploadWithProgress"
 export * from "./bytesHumanReadable"

scripts/Utils/uploadWithProgress.ts

@@ -2,7 +2,13 @@ export function uploadWithProgress(url, options: RequestInit, onProgress: ((ev:
 	return new Promise((resolve, reject) => {
 		let xhr = new XMLHttpRequest()
 
-		xhr.onload = e => resolve(xhr.responseText)
+		xhr.onload = () => {
+			if(xhr.status >= 400) {
+				return reject(xhr.responseText)
+			}
+
+			resolve(xhr.responseText)
+		}
 		xhr.onerror = reject
 
 		if(onProgress && xhr.upload) {