Convert @bugsnag/core/lib/iserror to TypeScript

packages/core/package.json

@@ -14,7 +14,6 @@
     "./lib/validators/int-range": "./src/lib/validators/int-range.js",
     "./lib/es-utils/includes": "./src/lib/es-utils/includes.js",
     "./lib/es-utils/filter": "./src/lib/es-utils/filter.js",
-    "./lib/iserror": "./src/lib/iserror.js",
     "./lib/es-utils/reduce": "./src/lib/es-utils/reduce.js",
     "./lib/es-utils/keys": "./src/lib/es-utils/keys.js",
     "./lib/derecursify": "./src/lib/derecursify.js",

packages/core/src/index.ts

@@ -4,5 +4,6 @@ export { default as Event } from './event'
 export { default as Session } from './session'
 export { default as schema } from './config'
 export { default as cloneClient } from './lib/clone-client'
+export { default as isError } from './lib/iserror'
 
 export * from './common'

packages/core/src/lib/iserror.ts

@@ -0,0 +1,36 @@
+// MIT License
+
+// Copyright (c) 2017 Anton Yefremov
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+const isError = (maybeError: unknown): maybeError is Error => {
+  switch (Object.prototype.toString.call(maybeError)) {
+    case '[object Error]':
+      return true
+    case '[object Exception]':
+      return true
+    case '[object DOMException]':
+      return true
+    default:
+      return maybeError instanceof Error
+  }
+}
+
+export default isError

packages/plugin-window-unhandled-rejection/src/unhandled-rejection.ts

@@ -1,5 +1,4 @@
-import { Config, Plugin } from '@bugsnag/core'
-import isError from '@bugsnag/core/lib/iserror'
+import { isError, Config, Plugin } from '@bugsnag/core'
 import fixBluebirdStacktrace from './fix-bluebird-stacktrace'
 
 type Listener = (evt: PromiseRejectionEvent) => void

packages/react-native/src/config.js

@@ -1,7 +1,6 @@
-const { schema } = require('@bugsnag/core')
+const { iserror, schema } = require('@bugsnag/core')
 const stringWithLength = require('@bugsnag/core/lib/validators/string-with-length')
 const rnPackage = require('react-native/package.json')
-const iserror = require('iserror')
 
 const ALLOWED_IN_JS = [
   'onError',