refactor(kit): refactor property checks (vuejs#554)

packages/devtools-kit/src/core/component/state/custom.ts

@@ -1,5 +1,5 @@
 import type { InspectorState, customTypeEnums } from '../types'
-import { getComponentName, getInstanceName } from '../utils'
+import { ensurePropertyExists, getComponentName, getInstanceName } from '../utils'
 import { processInstanceState } from './process'
 import { escape, getSetupStateType, toRaw } from './util'
 
@@ -225,7 +225,11 @@ export function getObjectDetails(object: Record<string, any>) {
   if (isState) {
     const stateTypeName = info.computed ? 'Computed' : info.ref ? 'Ref' : info.reactive ? 'Reactive' : null
     const value = toRaw(info.reactive ? object : object._value)
-    const raw = object.effect?.raw?.toString() || object.effect?.fn?.toString()
+
+    const raw = ensurePropertyExists(object, 'effect')
+      ? object.effect?.raw?.toString() || object.effect?.fn?.toString()
+      : null
+
     return {
       _custom: {
         type: stateTypeName?.toLowerCase(),
@@ -236,7 +240,7 @@ export function getObjectDetails(object: Record<string, any>) {
     }
   }
 
-  if (typeof object.__asyncLoader === 'function') {
+  if (ensurePropertyExists(object, '__asyncLoader') && typeof object.__asyncLoader === 'function') {
     return {
       _custom: {
         type: 'component-definition' satisfies customTypeEnums,

packages/devtools-kit/src/core/component/state/is.ts

@@ -1,8 +1,16 @@
-export function isVueInstance(value: Record<string, unknown>) {
-  return value._ && Object.keys(value._).includes('vnode')
+import { ensurePropertyExists } from '../utils'
+
+export function isVueInstance(value: any) {
+  if (!ensurePropertyExists(value, '_')) {
+    return false
+  }
+  if (!isPlainObject(value._)) {
+    return false
+  }
+  return Object.keys(value._).includes('vnode')
 }
 
-export function isPlainObject(obj: unknown) {
+export function isPlainObject(obj: unknown): obj is object {
   return Object.prototype.toString.call(obj) === '[object Object]'
 }
 

packages/devtools-kit/src/core/component/state/process.ts

@@ -1,7 +1,7 @@
 import { camelize } from '@vue/devtools-shared'
 import type { VueAppInstance } from '../../../types'
 import type { InspectorState } from '../types'
-import { returnError } from '../utils'
+import { ensurePropertyExists, returnError } from '../utils'
 import { vueBuiltins } from './constants'
 import { getPropType, getSetupStateType, toRaw } from './util'
 
@@ -151,8 +151,8 @@ function processSetupState(instance: VueAppInstance) {
       let result: Partial<InspectorState>
 
       let isOtherType = typeof value === 'function'
-        || typeof value?.render === 'function' // Components
-        || typeof value?.__asyncLoader === 'function' // Components
+        || (ensurePropertyExists(value, 'render') && typeof value.render === 'function') // Components
+        || (ensurePropertyExists(value, '__asyncLoader') && typeof value.__asyncLoader === 'function') // Components
         || (typeof value === 'object' && value && ('setup' in value || 'props' in value)) // Components
         || /^v[A-Z]/.test(key) // Directives
 
@@ -161,7 +161,9 @@ function processSetupState(instance: VueAppInstance) {
 
         const { stateType, stateTypeName } = getStateTypeAndName(info)
         const isState = info.ref || info.computed || info.reactive
-        const raw = rawData.effect?.raw?.toString() || rawData.effect?.fn?.toString()
+        const raw = ensurePropertyExists(rawData, 'effect')
+          ? rawData.effect?.raw?.toString() || rawData.effect?.fn?.toString()
+          : null
 
         if (stateType)
           isOtherType = false

packages/devtools-kit/src/core/component/state/replacer.ts

@@ -1,3 +1,4 @@
+import { ensurePropertyExists } from '../utils'
 import { INFINITY, MAX_ARRAY_SIZE, MAX_STRING_SIZE, NAN, NEGATIVE_INFINITY, UNDEFINED } from './constants'
 import { getBigIntDetails, getComponentDefinitionDetails, getDateDetails, getFunctionDetails, getHTMLElementDetails, getInstanceDetails, getMapDetails, getObjectDetails, getRouterDetails, getSetDetails, getStoreDetails } from './custom'
 import { isVueInstance } from './is'
@@ -69,8 +70,7 @@ export function stringifyReplacer(key: string | number, _value: any, depth?: num
     else if (proto === '[object Error]') {
       return `[native Error ${(val as Error).message}<>${(val as Error).stack}]`
     }
-    // @ts-expect-error skip type check
-    else if (val.state && val._vm) {
+    else if (ensurePropertyExists(val, 'state', true) && ensurePropertyExists(val, '_vm', true)) {
       return getStoreDetails(val)
     }
     else if (val.constructor && val.constructor.name === 'VueRouter') {
@@ -85,8 +85,7 @@ export function stringifyReplacer(key: string | number, _value: any, depth?: num
       seenInstance?.set(val, depth!)
       return componentVal
     }
-    // @ts-expect-error skip type check
-    else if (typeof val.render === 'function') {
+    else if (ensurePropertyExists(val, 'render', true) && typeof val.render === 'function') {
       return getComponentDefinitionDetails(val)
     }
     else if (val.constructor && val.constructor.name === 'VNode') {
@@ -96,12 +95,10 @@ export function stringifyReplacer(key: string | number, _value: any, depth?: num
     else if (typeof HTMLElement !== 'undefined' && val instanceof HTMLElement) {
       return getHTMLElementDetails(val)
     }
-    // @ts-expect-error skip type check
-    else if (val.constructor?.name === 'Store' && val._wrappedGetters) {
+    else if (val.constructor?.name === 'Store' && '_wrappedGetters' in val) {
       return '[object Store]'
     }
-    // @ts-expect-error skip type check
-    else if (val.currentRoute) {
+    else if (ensurePropertyExists(val, 'currentRoute', true)) {
       return '[object Router]'
     }
     const customDetails = getObjectDetails(val)

packages/devtools-kit/src/core/component/utils/index.ts

@@ -138,3 +138,12 @@ export function getComponentInstance(appRecord: AppRecord, instanceId: string |
   // @TODO: find a better way to handle it
   return instance || appRecord.instanceMap.get(':root')
 }
+
+// #542, should use 'in' operator to check if the key exists in the object
+export function ensurePropertyExists<R = Record<string, unknown>>(obj: unknown, key: string, skipObjCheck = false): obj is R {
+  return skipObjCheck
+    ? key in (obj as object)
+    : typeof obj === 'object' && obj !== null
+      ? key in obj
+      : false
+}

packages/devtools-kit/src/shared/transfer.ts

@@ -47,13 +47,13 @@ function encode(data: unknown, replacer: Replacer | null, list: unknown[], seen:
     const keys = Object.keys(data)
     for (i = 0, l = keys.length; i < l; i++) {
       key = keys[i]
+      // fix vue warn for compilerOptions passing-options-to-vuecompiler-sfc
+      // @TODO: need to check if it will cause any other issues
+      if (key === 'compilerOptions')
+        return index
       value = data[key]
       const isVm = value != null && isObject(value, Object.prototype.toString.call(data)) && isVueInstance(value)
       try {
-        // fix vue warn for compilerOptions passing-options-to-vuecompiler-sfc
-        // @TODO: need to check if it will cause any other issues
-        if (key === 'compilerOptions')
-          return index
         if (replacer) {
           value = replacer.call(data, key, value, depth, seenVueInstance)
         }