Removed deprecated XMLHttpRequest

scripts/Application.ts

@@ -13,7 +13,6 @@ export class Application {
 	loading: HTMLElement
 	currentPath: string
 	originalPath: string
-	lastRequest: XMLHttpRequest | null
 
 	constructor() {
 		this.currentPath = window.location.pathname
@@ -35,28 +34,9 @@ export class Application {
 	}
 
 	get(url: string): Promise<string> {
-		if(this.lastRequest) {
-			this.lastRequest.abort()
-			this.lastRequest = null
-		}
-
-		return new Promise((resolve, reject) => {
-			let request = new XMLHttpRequest()
-
-			request.onerror = () => reject(new Error("You are either offline or the requested page doesn't exist."))
-			request.ontimeout = () => reject(new Error("The page took too much time to respond."))
-			request.onload = () => {
-				if(request.status < 200 || request.status >= 400)
-					reject(request.responseText)
-				else
-					resolve(request.responseText)
-			}
-
-			request.open("GET", url, true)
-			request.send()
-
-			this.lastRequest = request
-		})
+		return fetch(url, {
+			credentials: "same-origin"
+		}).then(response => response.text())
 	}
 
 	load(url: string, options?: LoadOptions) {
@@ -87,6 +67,11 @@ export class Application {
 				return
 			}
 
+			// Outdated response.
+			if(this.currentPath !== url) {
+				return
+			}
+
 			// Remove listener after we finally got the correct event.
 			this.content.removeEventListener("transitionend", onTransitionEnd)