fix: typescript type of isIOS constant (#5163)

toofishes · web-flow · commit 60888d436bda · 2025-11-26T01:49:10.000Z
diff --git a/packages/shared/utils/is.ts b/packages/shared/utils/is.ts
@@ -23,8 +23,8 @@ export const hasOwn = <T extends object, K extends keyof T>(val: T, key: K): key
 
 export const isIOS = /* #__PURE__ */ getIsIOS()
 
-function getIsIOS() {
-  return isClient && window?.navigator?.userAgent && (
+function getIsIOS(): boolean {
+  return isClient && !!window?.navigator?.userAgent && (
     (/iP(?:ad|hone|od)/.test(window.navigator.userAgent))
     // The new iPad Pro Gen3 does not identify itself as iPad, but as Macintosh.
     // https://github.com/vueuse/vueuse/issues/3577
