Add eqeqeq rule but require == for null

ts/util/dropNull.ts

@@ -8,6 +8,7 @@ export type NullToUndefined<T> = Extract<T, null> extends never
 export function dropNull<T>(
   value: NonNullable<T> | null | undefined
 ): T | undefined {
+  // eslint-disable-next-line eqeqeq
   if (value === null) {
     return undefined;
   }
@@ -22,7 +23,7 @@ export function shallowDropNull<O extends { [key: string]: any }>(
       [Property in keyof O]: NullToUndefined<O[Property]>;
     }
   | undefined {
-  if (value === null || value === undefined) {
+  if (value == null) {
     return undefined;
   }
 

ts/util/isNotNil.ts

@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: AGPL-3.0-only
 
 export function isNotNil<T>(value: T | null | undefined): value is T {
-  if (value === null || value === undefined) {
+  if (value == null) {
     return false;
   }
   return true;

ts/util/isRecord.ts

@@ -2,4 +2,4 @@
 // SPDX-License-Identifier: AGPL-3.0-only
 
 export const isRecord = (value: unknown): value is Record<string, unknown> =>
-  typeof value === 'object' && !Array.isArray(value) && value !== null;
+  typeof value === 'object' && !Array.isArray(value) && value != null;

ts/util/iterables.ts

@@ -7,7 +7,7 @@ import { getOwn } from './getOwn';
 
 export function isIterable(value: unknown): value is Iterable<unknown> {
   return (
-    (typeof value === 'object' && value !== null && Symbol.iterator in value) ||
+    (typeof value === 'object' && value != null && Symbol.iterator in value) ||
     typeof value === 'string'
   );
 }

ts/util/memoizeByRoot.ts

@@ -27,7 +27,7 @@ export function memoizeByRoot<F extends Function>(
 
   const wrap = (root: unknown, ...rest: Array<unknown>): unknown => {
     strictAssert(
-      typeof root === 'object' && root !== null,
+      typeof root === 'object' && root != null,
       'Root is not object'
     );
 

ts/util/sessionTranslation.ts

@@ -336,7 +336,7 @@ function binaryToUint8Array(
   length: number
 ): Uint8Array {
   const target = get(object, path);
-  if (target === null || target === undefined) {
+  if (target == null) {
     throw new Error(`binaryToUint8Array: Falsey path ${path}`);
   }
 
@@ -357,7 +357,7 @@ function binaryToUint8Array(
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 function getInteger(object: any, path: string): number {
   const target = get(object, path);
-  if (target === null || target === undefined) {
+  if (target == null) {
     throw new Error(`getInteger: Falsey path ${path}`);
   }