feat(displayName): fixes #17

README.md

@@ -25,6 +25,8 @@ import ErrorSubclass from 'error-subclass';
 
 class MyError extends ErrorSubclass {
 
+  static displayName = 'MyError'; // optional. survives minification
+
   // Add extra properties/methods if desired:
 
   get code() {

package.json

@@ -5,6 +5,7 @@
   "devDependencies": {
     "@spudly/eslint-config": "^5.0.1",
     "babel-preset-es2015": "^6.9.0",
+    "babel-preset-stage-2": "^6.22.0",
     "babel-register": "^6.11.6",
     "babelify": "^7.3.0",
     "browserify": "^14.0.0",
@@ -15,7 +16,8 @@
   },
   "babel": {
     "presets": [
-      "es2015"
+      "es2015",
+      "stage-2"
     ]
   },
   "scripts": {

src/ErrorSubclass.js

@@ -5,7 +5,9 @@ const ErrorSubclass = function ErrorSubclass(...args) {
   const _error = Error.apply(this, args);
 
   Object.defineProperty(this, 'message', {value: message});
-  Object.defineProperty(this, 'name', {value: this.constructor.name});
+  Object.defineProperty(this, 'name', {
+    value: this.constructor.displayName || this.constructor.name,
+  });
 
   if (Error.captureStackTrace) {
     Error.captureStackTrace(this, this.constructor);

test/ErrorSubclassTest.js

@@ -3,7 +3,9 @@ import ErrorSubclass from '../src/ErrorSubclass';
 
 const ERROR_MESSAGE = '__MESSAGE__';
 
-class SubSubError extends ErrorSubclass {}
+class SubSubError extends ErrorSubclass {
+  static displayName = 'SubSubErrorDisplayName';
+}
 
 const {captureStackTrace} = Error;
 
@@ -29,9 +31,9 @@ const tests = {
           ok(instance instanceof SubSubError);
         },
 
-        'should have a name': () => {
+        'should have a name that matches the displayName': () => {
           const instance = new SubSubError(ERROR_MESSAGE);
-          equal(instance.name, 'SubSubError');
+          equal(instance.name, 'SubSubErrorDisplayName');
         },
 
         'should have a message': () => {
@@ -42,15 +44,15 @@ const tests = {
         'has a toString() method': () => {
           const instance = new SubSubError(ERROR_MESSAGE);
           equal(typeof instance.toString, 'function');
-          equal(instance.toString(), `SubSubError: ${ERROR_MESSAGE}`);
+          equal(instance.toString(), `SubSubErrorDisplayName: ${ERROR_MESSAGE}`);
         },
 
         'when captureStackTrace is supported, should have a stack': () => {
           equal(typeof Error.captureStackTrace, 'function');
           const instance = new SubSubError(ERROR_MESSAGE);
           ok(instance.stack);
           equal(typeof instance.stack, 'string');
-          ok(instance.stack.match(`SubSubError: ${ERROR_MESSAGE}`));
+          ok(instance.stack.match(`SubSubErrorDisplayName: ${ERROR_MESSAGE}`));
         },
 
         // 'when captureStackTrace is not supported, should have a stack': () => {