diff --git a/web/src/common/errors.ts b/web/src/common/errors.ts
index ad6156bfad..6d71b27704 100644
--- a/web/src/common/errors.ts
+++ b/web/src/common/errors.ts
@@ -16,7 +16,7 @@ export async function parseAPIError(error: Error): Promise<APIErrorTypes> {
     if (!(error instanceof ResponseError)) {
         return error;
     }
-    if (error.response.status < 400 && error.response.status > 499) {
+    if (error.response.status < 400 || error.response.status > 499) {
         return error;
     }
     const body = await error.response.json();
diff --git a/web/src/common/helpers/plex.ts b/web/src/common/helpers/plex.ts
index 6e9639934b..c3735af5bd 100644
--- a/web/src/common/helpers/plex.ts
+++ b/web/src/common/helpers/plex.ts
@@ -55,9 +55,7 @@ export class PlexAPIClient {
     ): Promise<{ authUrl: string; pin: PlexPinResponse }> {
         const headers = {
             ...DEFAULT_HEADERS,
-            ...{
-                "X-Plex-Client-Identifier": clientIdentifier,
-            },
+            "X-Plex-Client-Identifier": clientIdentifier,
         };
         const pinResponse = await fetch("https://plex.tv/api/v2/pins.json?strong=true", {
             method: "POST",
@@ -75,9 +73,7 @@ export class PlexAPIClient {
     static async pinStatus(clientIdentifier: string, id: number): Promise<string | undefined> {
         const headers = {
             ...DEFAULT_HEADERS,
-            ...{
-                "X-Plex-Client-Identifier": clientIdentifier,
-            },
+            "X-Plex-Client-Identifier": clientIdentifier,
         };
         const pinResponse = await fetch(`https://plex.tv/api/v2/pins/${id}`, {
             headers: headers,
diff --git a/web/src/common/utils.ts b/web/src/common/utils.ts
index cbaef55f8c..ff4fe512b3 100644
--- a/web/src/common/utils.ts
+++ b/web/src/common/utils.ts
@@ -123,7 +123,7 @@ const isCSSResult = (v: unknown): v is CSSResult =>
 
 // prettier-ignore
 export const _adaptCSS = (sheet: AdaptableStylesheet): CSSStyleSheet =>
-    (typeof sheet === "string" ? css([sheet] as unknown as TemplateStringsArray, ...[]).styleSheet
+    (typeof sheet === "string" ? css([sheet] as unknown as TemplateStringsArray, []).styleSheet
         : isCSSResult(sheet) ? sheet.styleSheet
         : sheet) as CSSStyleSheet;
 
diff --git a/web/src/elements/buttons/TokenCopyButton/ak-token-copy-button.stories.ts b/web/src/elements/buttons/TokenCopyButton/ak-token-copy-button.stories.ts
index 6b3f52e84a..db6ddd63b5 100644
--- a/web/src/elements/buttons/TokenCopyButton/ak-token-copy-button.stories.ts
+++ b/web/src/elements/buttons/TokenCopyButton/ak-token-copy-button.stories.ts
@@ -12,7 +12,7 @@ import AKTokenCopyButton from "./ak-token-copy-button";
 
 function makeid(length: number) {
     const sample = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
-    return new Array(length)
+    return Array.from({ length })
         .fill(" ")
         .map(() => sample.charAt(Math.floor(Math.random() * sample.length)))
         .join("");
diff --git a/web/src/elements/router/RouterOutlet.ts b/web/src/elements/router/RouterOutlet.ts
index 8aa54e0137..9d5687085c 100644
--- a/web/src/elements/router/RouterOutlet.ts
+++ b/web/src/elements/router/RouterOutlet.ts
@@ -91,7 +91,7 @@ export class RouterOutlet extends AKElement {
         let matchedRoute: RouteMatch | null = null;
         this.routes.some((route) => {
             const match = route.url.exec(activeUrl);
-            if (match != null) {
+            if (match !== null) {
                 matchedRoute = new RouteMatch(route);
                 matchedRoute.arguments = match.groups || {};
                 matchedRoute.fullUrl = activeUrl;