added getJSExceptionHandler

Author: a7ul

.eslintrc

@@ -10,8 +10,11 @@
     "react",
     "react-native"
   ],
-  "ecmaFeatures": {
-    "jsx": true
+  "parserOptions": {
+    "ecmaFeatures": {
+      "jsx": true
+    },
+    "sourceType": "module"
   },
   "extends": ["eslint:recommended", "plugin:react/recommended"],
   "rules": {

README.md

@@ -27,7 +27,7 @@ npm i react-native-exception-handler --save
 ### Usage
 
 ```js
-import {setJSExceptionHandler} from 'react-native-exception-handler';
+import {setJSExceptionHandler, getJSExceptionHandler} from 'react-native-exception-handler';
 
 .
 .
@@ -48,6 +48,8 @@ or
 setJSExceptionHandler(errorHandler, true); //Second argument true is basically
                                         //if u need the handler to be called in place of RED  
                                         //screen in development mode also
+
+const currentHandler = getJSExceptionHandler(); // getJSExceptionHandler gives the currently set handler
 ```                                     
 
 
@@ -158,6 +160,7 @@ setJSExceptionHandler(errorHandler);
 ```
 
 *More Examples can be found in the examples folder*
+- Preserving old handler
 
 ## NOTES
 1. This module only helps in catching the runtime errors in JS. Native errors can still crash your app without any prompt.

examples/preservingOldHandler.js

@@ -0,0 +1,17 @@
+import {getJSExceptionHandler, setJSExceptionHandler} from 'react-native-exception-handler';
+
+const customErrorHandler = (error, isFatal) => {
+  // Logic for reporting to devs
+  // Example : Log issues to github issues using github apis.
+  console.log(error, isFatal); // example
+};
+
+const previousErrorHandler = getJSExceptionHandler(); // by default u will get the red screen error handler here
+
+const errorHandler = (e, isFatal) => {
+  customErrorHandler(e, isFatal);
+  previousErrorHandler(e, isFatal);
+};
+
+// We will still see the error screen, but our customErrorHandler() function will be called
+setJSExceptionHandler(errorHandler);

index.js

@@ -9,6 +9,9 @@ export const setJSExceptionHandler = (customHandler = noop, allowedInDevMode = f
   }
 };
 
+export const getJSExceptionHandler = () => global.ErrorUtils.getGlobalHandler();
+
 export default {
-  setJSExceptionHandler
+  setJSExceptionHandler,
+  getJSExceptionHandler
 };

package.json

@@ -4,9 +4,9 @@
     "description": "A react native module that lets you to register a global error handler that can capture fatal/non fatal uncaught exceptions.",
     "main": "index.js",
     "scripts": {
-      "test": "echo no tests && exit 1",
-      "lint": "eslint app/",
-      "lint:fix": "eslint app/ --fix"
+        "test": "echo no tests && exit 1",
+        "lint": "eslint app/",
+        "lint:fix": "eslint app/ --fix"
     },
     "repository": {
         "type": "git",
@@ -35,5 +35,11 @@
     "bugs": {
         "url": "https://github.com/master-atul/react-native-exception-handler/issues"
     },
-    "homepage": "https://atulr.com/react-native-exception-handler"
+    "homepage": "https://github.com/master-atul/react-native-exception-handler",
+    "devDependencies": {
+        "babel-eslint": "^7.2.3",
+        "eslint": "^4.0.0",
+        "eslint-plugin-react": "^7.1.0",
+        "eslint-plugin-react-native": "^2.3.2"
+    }
 }