diff --git a/src/features/achievements/achievement.tsx b/src/features/achievements/achievement.tsx
index 9bf454f..286e159 100644
--- a/src/features/achievements/achievement.tsx
+++ b/src/features/achievements/achievement.tsx
@@ -208,7 +208,7 @@ export function createAchievement<T extends AchievementOptions>(
                         unref(achievement.earned) &&
                         !(
                             display != null &&
-                            typeof display == "object" &&
+                            typeof display === "object" &&
                             "optionsDisplay" in (display as Record<string, unknown>)
                         )
                     ) {
diff --git a/src/features/feature.ts b/src/features/feature.ts
index 429629a..e829303 100644
--- a/src/features/feature.ts
+++ b/src/features/feature.ts
@@ -92,7 +92,7 @@ export function setDefault<T, K extends keyof T>(
     key: K,
     value: T[K]
 ): asserts object is Exclude<T, K> & Required<Pick<T, K>> {
-    if (object[key] === undefined && value != undefined) {
+    if (object[key] == null && value != null) {
         object[key] = value;
     }
 }
@@ -135,7 +135,7 @@ export function excludeFeatures(obj: Record<string, unknown>, ...types: symbol[]
             if (value != null && typeof value === "object") {
                 if (
                     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-                    typeof (value as Record<string, any>).type == "symbol" &&
+                    typeof (value as Record<string, any>).type === "symbol" &&
                     // eslint-disable-next-line @typescript-eslint/no-explicit-any
                     !types.includes((value as Record<string, any>).type)
                 ) {
diff --git a/src/features/grids/grid.ts b/src/features/grids/grid.ts
index 454bbfc..ca2e3f7 100644
--- a/src/features/grids/grid.ts
+++ b/src/features/grids/grid.ts
@@ -128,7 +128,7 @@ function getCellHandler(id: string): ProxyHandler<GenericGrid> {
             if (isFunction(prop)) {
                 return () => prop.call(receiver, id, target.getState(id));
             }
-            if (prop != undefined || typeof key === "symbol") {
+            if (prop != null || typeof key === "symbol") {
                 return prop;
             }
 
@@ -145,7 +145,7 @@ function getCellHandler(id: string): ProxyHandler<GenericGrid> {
                     cache[key] = computed(() => prop.call(receiver, id, target.getState(id)));
                 }
                 return cache[key].value;
-            } else if (prop != undefined) {
+            } else if (prop != null) {
                 return unref(prop);
             }
 
@@ -153,7 +153,7 @@ function getCellHandler(id: string): ProxyHandler<GenericGrid> {
             prop = (target as any)[`on${key}`];
             if (isFunction(prop)) {
                 return () => prop.call(receiver, id, target.getState(id));
-            } else if (prop != undefined) {
+            } else if (prop != null) {
                 return prop;
             }
 
@@ -318,7 +318,7 @@ export function createGrid<T extends GridOptions>(
             return grid.id + "-" + cell;
         };
         grid.getState = function (this: GenericGrid, cell: string | number) {
-            if (this.cellState.value[cell] != undefined) {
+            if (this.cellState.value[cell] != null) {
                 return cellState.value[cell];
             }
             return this.cells[cell].startState;
diff --git a/src/features/trees/tree.ts b/src/features/trees/tree.ts
index 5a03189..58c9db5 100644
--- a/src/features/trees/tree.ts
+++ b/src/features/trees/tree.ts
@@ -342,7 +342,7 @@ export const branchedResetPropagation = function (
     if (links == null) return;
     const reset: GenericTreeNode[] = [];
     let current = [resettingNode];
-    while (current.length != 0) {
+    while (current.length !== 0) {
         const next: GenericTreeNode[] = [];
         for (const node of current) {
             for (const link of links.filter(link => link.startNode === node)) {
diff --git a/src/game/gameLoop.ts b/src/game/gameLoop.ts
index b001dd6..9f5c5ca 100644
--- a/src/game/gameLoop.ts
+++ b/src/game/gameLoop.ts
@@ -43,7 +43,7 @@ function update() {
     loadingSave.value = false;
 
     // Add offline time if any
-    if (player.offlineTime != undefined) {
+    if (player.offlineTime != null) {
         if (Decimal.gt(player.offlineTime, projInfo.offlineLimit * 3600)) {
             player.offlineTime = projInfo.offlineLimit * 3600;
         }
@@ -63,7 +63,7 @@ function update() {
     diff = Math.min(diff, projInfo.maxTickLength);
 
     // Apply dev speed
-    if (player.devSpeed != undefined) {
+    if (player.devSpeed != null) {
         diff *= player.devSpeed;
     }
 
diff --git a/src/util/break_eternity.ts b/src/util/break_eternity.ts
index dd6aed7..6734ece 100644
--- a/src/util/break_eternity.ts
+++ b/src/util/break_eternity.ts
@@ -26,7 +26,7 @@ export function exponentialFormat(num: DecimalSource, precision: number, mantiss
 }
 
 export function commaFormat(num: DecimalSource, precision: number): string {
-    if (num === null || num === undefined) {
+    if (num == null) {
         return "NaN";
     }
     num = new Decimal(num);
@@ -36,12 +36,12 @@ export function commaFormat(num: DecimalSource, precision: number): string {
     const init = num.toStringWithDecimalPlaces(precision);
     const portions = init.split(".");
     portions[0] = portions[0].replace(/(\d)(?=(\d\d\d)+(?!\d))/g, "$1,");
-    if (portions.length == 1) return portions[0];
+    if (portions.length === 1) return portions[0];
     return portions[0] + "." + portions[1];
 }
 
 export function regularFormat(num: DecimalSource, precision: number): string {
-    if (num === null || num === undefined) {
+    if (num == null) {
         return "NaN";
     }
     num = new Decimal(num);
diff --git a/src/util/galaxy.ts b/src/util/galaxy.ts
index 384ed3d..fdefe57 100644
--- a/src/util/galaxy.ts
+++ b/src/util/galaxy.ts
@@ -110,7 +110,7 @@ function syncSaves(
         }
         availableSlots.delete(cloudSave.slot);
         const localSaveId = settings.saves.find(id => id === cloudSave.content.id);
-        if (localSaveId == undefined) {
+        if (localSaveId == null) {
             settings.saves.push(cloudSave.content.id);
             save(setupInitialStore(cloudSave.content));
         } else {
diff --git a/src/util/vue.tsx b/src/util/vue.tsx
index 3ba5f06..5f05618 100644
--- a/src/util/vue.tsx
+++ b/src/util/vue.tsx
@@ -191,7 +191,7 @@ export function computeOptionalComponent(
     watchEffect(() => {
         const currComponent = unwrapRef(component);
         comp.value =
-            currComponent == "" || currComponent == null
+            currComponent === "" || currComponent == null
                 ? null
                 : coerceComponent(currComponent, defaultWrapper);
     });