diff --git a/frontend/app/block/block.tsx b/frontend/app/block/block.tsx
index 97d11a1d..6dc99bb1 100644
--- a/frontend/app/block/block.tsx
+++ b/frontend/app/block/block.tsx
@@ -18,7 +18,7 @@ interface BlockProps {
 }
 
 const BlockHeader = ({ blockId, onClose }: BlockProps) => {
-    const [blockData, blockDataLoading] = WOS.useWaveObjectValue<Block>(WOS.makeORef("block", blockId));
+    const [blockData] = WOS.useWaveObjectValue<Block>(WOS.makeORef("block", blockId));
 
     return (
         <div key="header" className="block-header">
diff --git a/frontend/app/store/wos.ts b/frontend/app/store/wos.ts
index bffeb8a2..d4952979 100644
--- a/frontend/app/store/wos.ts
+++ b/frontend/app/store/wos.ts
@@ -21,7 +21,7 @@ type WaveObjectValue<T extends WaveObj> = {
 };
 
 function splitORef(oref: string): [string, string] {
-    let parts = oref.split(":");
+    const parts = oref.split(":");
     if (parts.length != 2) {
         throw new Error("invalid oref");
     }
@@ -54,11 +54,7 @@ function makeORef(otype: string, oid: string): string {
 }
 
 function GetObject<T>(oref: string): Promise<T> {
-    let prtn = $Call.ByName(
-        "github.com/wavetermdev/thenextwave/pkg/service/objectservice.ObjectService.GetObject",
-        oref
-    );
-    return prtn;
+    return $Call.ByName("github.com/wavetermdev/thenextwave/pkg/service/objectservice.ObjectService.GetObject", oref);
 }
 
 const waveObjectValueCache = new Map<string, WaveObjectValue<any>>();
@@ -75,8 +71,8 @@ function createWaveValueObject<T extends WaveObj>(oref: string, shouldFetch: boo
     if (!shouldFetch) {
         return wov;
     }
-    let startTs = Date.now();
-    let localPromise = GetObject<T>(oref);
+    const startTs = Date.now();
+    const localPromise = GetObject<T>(oref);
     wov.pendingPromise = localPromise;
     localPromise.then((val) => {
         if (wov.pendingPromise != localPromise) {
@@ -138,24 +134,21 @@ function getWaveObjectAtom<T extends WaveObj>(oref: string): jotai.WritableAtom<
         waveObjectValueCache.set(oref, wov);
     }
     return jotai.atom(
-        (get) => {
-            let dataValue = get(wov.dataAtom);
-            return dataValue.value;
-        },
+        (get) => get(wov.dataAtom).value,
         (_get, set, value: T) => {
             setObjectValue(value, set, true);
         }
     );
 }
 
-function getWaveObjectLoadingAtom<T extends WaveObj>(oref: string): jotai.Atom<boolean> {
+function getWaveObjectLoadingAtom(oref: string): jotai.Atom<boolean> {
     let wov = waveObjectValueCache.get(oref);
     if (wov == null) {
         wov = createWaveValueObject(oref, true);
         waveObjectValueCache.set(oref, wov);
     }
     return jotai.atom((get) => {
-        let dataValue = get(wov.dataAtom);
+        const dataValue = get(wov.dataAtom);
         if (dataValue.loading) {
             return null;
         }
@@ -203,7 +196,7 @@ function updateWaveObject(update: WaveObjUpdate) {
     if (update == null) {
         return;
     }
-    let oref = makeORef(update.otype, update.oid);
+    const oref = makeORef(update.otype, update.oid);
     let wov = waveObjectValueCache.get(oref);
     if (wov == null) {
         wov = createWaveValueObject(oref, false);
@@ -217,7 +210,7 @@ function updateWaveObject(update: WaveObjUpdate) {
             console.log("invalid wave object update", update);
             return;
         }
-        let curValue: WaveObjectDataItemType<WaveObj> = globalStore.get(wov.dataAtom);
+        const curValue: WaveObjectDataItemType<WaveObj> = globalStore.get(wov.dataAtom);
         if (curValue.value != null && curValue.value.version >= update.obj.version) {
             return;
         }
@@ -229,14 +222,14 @@ function updateWaveObject(update: WaveObjUpdate) {
 }
 
 function updateWaveObjects(vals: WaveObjUpdate[]) {
-    for (let val of vals) {
+    for (const val of vals) {
         updateWaveObject(val);
     }
 }
 
 function cleanWaveObjectCache() {
-    let now = Date.now();
-    for (let [oref, wov] of waveObjectValueCache) {
+    const now = Date.now();
+    for (const [oref, wov] of waveObjectValueCache) {
         if (wov.refCount == 0 && wov.holdTime < now) {
             waveObjectValueCache.delete(oref);
         }
@@ -280,11 +273,11 @@ function wrapObjectServiceCall<T>(fnName: string, ...args: any[]): Promise<T> {
 // should provide getFn if it is available (e.g. inside of a jotai atom)
 // otherwise it will use the globalStore.get function
 function getObjectValue<T>(oref: string, getFn?: jotai.Getter): T {
-    let wov = waveObjectValueCache.get(oref);
-    if (wov == null) {
+    const wov = waveObjectValueCache.get(oref);
+    if (wov === undefined) {
         return null;
     }
-    if (getFn == null) {
+    if (getFn === undefined) {
         getFn = globalStore.get;
     }
     const atomVal = getFn(wov.dataAtom);
@@ -296,11 +289,11 @@ function getObjectValue<T>(oref: string, getFn?: jotai.Getter): T {
 // otherwise it will use the globalStore.set function
 function setObjectValue<T extends WaveObj>(value: T, setFn?: jotai.Setter, pushToServer?: boolean) {
     const oref = makeORef(value.otype, value.oid);
-    let wov = waveObjectValueCache.get(oref);
-    if (wov == null) {
+    const wov = waveObjectValueCache.get(oref);
+    if (wov === undefined) {
         return;
     }
-    if (setFn == null) {
+    if (setFn === undefined) {
         setFn = globalStore.set;
     }
     setFn(wov.dataAtom, { value: value, loading: false });
diff --git a/frontend/util/fontutil.ts b/frontend/util/fontutil.ts
index fd231a06..aa9d4afe 100644
--- a/frontend/util/fontutil.ts
+++ b/frontend/util/fontutil.ts
@@ -61,11 +61,11 @@ function loadFiraCodeFont() {
         return;
     }
     isFiraCodeLoaded = true;
-    let firaCodeRegular = new FontFace("Fira Code", "url('/fonts/firacode-regular.woff2')", {
+    const firaCodeRegular = new FontFace("Fira Code", "url('/fonts/firacode-regular.woff2')", {
         style: "normal",
         weight: "400",
     });
-    let firaCodeBold = new FontFace("Fira Code", "url('/fonts/firacode-bold.woff2')", {
+    const firaCodeBold = new FontFace("Fira Code", "url('/fonts/firacode-bold.woff2')", {
         style: "normal",
         weight: "700",
     });
@@ -80,19 +80,19 @@ function loadHackFont() {
         return;
     }
     isHackFontLoaded = true;
-    let hackRegular = new FontFace("Hack", "url('/fonts/hack-regular.woff2')", {
+    const hackRegular = new FontFace("Hack", "url('/fonts/hack-regular.woff2')", {
         style: "normal",
         weight: "400",
     });
-    let hackBold = new FontFace("Hack", "url('/fonts/hack-bold.woff2')", {
+    const hackBold = new FontFace("Hack", "url('/fonts/hack-bold.woff2')", {
         style: "normal",
         weight: "700",
     });
-    let hackItalic = new FontFace("Hack", "url('/fonts/hack-italic.woff2')", {
+    const hackItalic = new FontFace("Hack", "url('/fonts/hack-italic.woff2')", {
         style: "italic",
         weight: "400",
     });
-    let hackBoldItalic = new FontFace("Hack", "url('/fonts/hack-bolditalic.woff2')", {
+    const hackBoldItalic = new FontFace("Hack", "url('/fonts/hack-bolditalic.woff2')", {
         style: "italic",
         weight: "700",
     });
@@ -111,7 +111,7 @@ function loadBaseFonts() {
         return;
     }
     isBaseFontsLoaded = true;
-    let mmFont = new FontFace("Martian Mono", "url(/fonts/MartianMono-VariableFont_wdth,wght.ttf)", {
+    const mmFont = new FontFace("Martian Mono", "url(/fonts/MartianMono-VariableFont_wdth,wght.ttf)", {
         style: "normal",
         weight: "normal",
     });
diff --git a/frontend/util/ijson.ts b/frontend/util/ijson.ts
index dbcfd98d..5cccafda 100644
--- a/frontend/util/ijson.ts
+++ b/frontend/util/ijson.ts
@@ -13,7 +13,7 @@ function formatPath(path: PathType): string {
         return "$";
     }
     let pathStr = "$";
-    for (let pathPart of path) {
+    for (const pathPart of path) {
         if (typeof pathPart === "string") {
             if (simplePathStrRe.test(pathPart)) {
                 pathStr += "." + pathPart;
@@ -39,7 +39,7 @@ function isObject(obj: any): boolean {
 
 function getPath(obj: any, path: PathType): any {
     let cur = obj;
-    for (let pathPart of path) {
+    for (const pathPart of path) {
         if (cur == null) {
             return null;
         }
@@ -86,7 +86,7 @@ function checkPath(path: PathType): boolean {
     if (!isArray(path)) {
         return false;
     }
-    for (let pathPart of path) {
+    for (const pathPart of path) {
         if (typeof pathPart !== "string" && typeof pathPart !== "number") {
             return false;
         }
@@ -118,7 +118,7 @@ function isEmpty(obj: any): boolean {
         return obj.length == 0;
     }
     if (isObject(obj)) {
-        for (let key in obj) {
+        for (const _ in obj) {
             return false;
         }
         return true;
diff --git a/frontend/wave.ts b/frontend/wave.ts
index 45e97ad3..892f4d19 100644
--- a/frontend/wave.ts
+++ b/frontend/wave.ts
@@ -33,9 +33,9 @@ document.addEventListener("DOMContentLoaded", async () => {
     await WOS.loadAndPinWaveObject<Client>(WOS.makeORef("client", clientId));
     const waveWindow = await WOS.loadAndPinWaveObject<WaveWindow>(WOS.makeORef("window", windowId));
     await WOS.loadAndPinWaveObject<Workspace>(WOS.makeORef("workspace", waveWindow.workspaceid));
-    let reactElem = React.createElement(App, null, null);
-    let elem = document.getElementById("main");
-    let root = createRoot(elem);
+    const reactElem = React.createElement(App, null, null);
+    const elem = document.getElementById("main");
+    const root = createRoot(elem);
     document.fonts.ready.then(() => {
         console.log("Wave First Render");
         root.render(reactElem);