refactor(types): prefer interfaces

.eslintrc.json

@@ -46,8 +46,8 @@
     ],
     "@typescript-eslint/no-use-before-define": "off",
     "@typescript-eslint/no-empty-function": "off",
-    "@typescript-eslint/no-empty-interface": "off",
     "@typescript-eslint/no-explicit-any": "off",
+    "@typescript-eslint/consistent-type-definitions": ["error", "interface"],
     "jest/consistent-test-it": [
       "error",
       { "fn": "it", "withinDescribe": "it" }

src/react.ts

@@ -24,7 +24,9 @@ const { useSyncExternalStore } = useSyncExternalStoreExports
 //   type Snapshot<T extends object> = ReturnType<SnapshotWrapper<T>['fn']>
 //
 // Using copy-paste types for now:
-type AsRef = { $$valtioRef: true }
+interface AsRef {
+  $$valtioRef: true
+}
 type AnyFunction = (...args: any[]) => any
 type Snapshot<T> = T extends AnyFunction
   ? T
@@ -47,7 +49,7 @@ const useAffectedDebugValue = (
   useDebugValue(pathList.current)
 }
 
-type Options = {
+interface Options {
   sync?: boolean
 }
 

src/utils/derive.ts

@@ -2,7 +2,7 @@ import { getVersion, proxy, subscribe } from '../vanilla'
 
 type DeriveGet = <T extends object>(proxyObject: T) => T
 
-type Subscription = {
+interface Subscription {
   s: object // "s"ourceObject
   d: object // "d"erivedObject
   k: string // derived "k"ey
@@ -198,7 +198,7 @@ export function derive<T extends object, U extends object>(
       throw new Error('object property already defined')
     }
     const fn = derivedFns[key as keyof U]
-    type DependencyEntry = {
+    interface DependencyEntry {
       v: number // "v"ersion
       s?: Subscription // "s"ubscription
     }

src/utils/devtools.ts

@@ -2,15 +2,15 @@ import { snapshot, subscribe } from '../vanilla'
 import type {} from '@redux-devtools/extension'
 
 // FIXME https://github.com/reduxjs/redux-devtools/issues/1097
-type Message = {
+interface Message {
   type: string
   payload?: any
   state?: any
 }
 
 const DEVTOOLS = Symbol()
 
-type Options = {
+interface Options {
   enabled?: boolean
   name?: string
 }

src/utils/proxyWithComputed.ts

@@ -11,7 +11,9 @@ import { proxy, snapshot } from '../vanilla'
 //   type Snapshot<T extends object> = ReturnType<SnapshotWrapper<T>['fn']>
 //
 // Using copy-paste types for now:
-type AsRef = { $$valtioRef: true }
+interface AsRef {
+  $$valtioRef: true
+}
 type AnyFunction = (...args: any[]) => any
 type Snapshot<T> = T extends AnyFunction
   ? T

src/utils/watch.ts

@@ -3,7 +3,7 @@ import { subscribe } from '../vanilla'
 type Cleanup = () => void
 type WatchGet = <T extends object>(proxyObject: T) => T
 type WatchCallback = (get: WatchGet) => Cleanup | void | undefined
-type WatchOptions = {
+interface WatchOptions {
   sync?: boolean
 }
 

src/vanilla.ts

@@ -7,7 +7,9 @@ const HANDLER = __DEV__ ? Symbol('HANDLER') : Symbol()
 const PROMISE_RESULT = __DEV__ ? Symbol('PROMISE_RESULT') : Symbol()
 const PROMISE_ERROR = __DEV__ ? Symbol('PROMISE_ERROR') : Symbol()
 
-type AsRef = { $$valtioRef: true }
+interface AsRef {
+  $$valtioRef: true
+}
 const refSet = new WeakSet()
 export function ref<T extends object>(o: T): T & AsRef {
   refSet.add(o)

tests/derive.test.tsx

@@ -411,7 +411,7 @@ describe('glitch free', () => {
 })
 
 describe('two derived properties', () => {
-  type State = {
+  interface State {
     a: number
     derived1?: unknown
     derived2?: unknown