fix

src/utils/type-utils.ts

@@ -15,21 +15,21 @@ export const isUint8Array = function (x: unknown): x is Uint8Array {
 // from a comment on http://dbj.org/dbj/?p=286
 // fails on only one very rare and deliberate custom object:
 // let bomb = { toString : undefined, valueOf: function(o) { return "function BOMBA!"; }};
-export const isFunction = function (f: any): f is (...args: any[]) => any {
+export const isFunction = function (x: unknown): x is (...args: any[]) => any {
     // eslint-disable-next-line posthog-js/no-direct-function-check
-    return typeof f === 'function'
+    return typeof x === 'function'
 }
 
-export const isNativeFunction = function (f: any): f is (...args: any[]) => any {
-    return isFunction(f) && f.toString().indexOf('[native code]') !== -1
+export const isNativeFunction = function (x: unknown): x is (...args: any[]) => any {
+    return isFunction(x) && x.toString().indexOf('[native code]') !== -1
 }
 
 // When angular patches functions they pass the above `isNativeFunction` check
-export const isAngularZonePatchedFunction = function (f: any): boolean {
-    if (!isFunction(f)) {
+export const isAngularZonePatchedFunction = function (x: unknown): boolean {
+    if (!isFunction(x)) {
         return false
     }
-    const prototypeKeys = Object.getOwnPropertyNames(f.prototype || {})
+    const prototypeKeys = Object.getOwnPropertyNames(x.prototype || {})
     return prototypeKeys.some((key) => key.indexOf('__zone'))
 }