fix: Add crossorigin attribute to script HTML tags

pardoman · Federico Medina · commit 5690ffe82bb7 · 2016-07-03T16:55:47.000-07:00
The Problem: When an error occurs in a script that is not served by the default server spawned by karma, the stack trace gets lost and only the message "Script Error" is captured and reported back. This makes it hard to pin-point where the error originated from. The Solution: Add "crossorigin" attribute to generated script tags. Solution is inspired by this article: https://blog.getsentry.com/2016/05/17/what-is-script-error.html Other: Update middleware unit test
diff --git a/lib/middleware/karma.js b/lib/middleware/karma.js
@@ -27,7 +27,7 @@ var urlparse = function (urlStr) {
 var common = require('./common')
 
 var VERSION = require('../constants').VERSION
-var SCRIPT_TAG = '<script type="%s" src="%s"></script>'
+var SCRIPT_TAG = '<script type="%s" src="%s" crossorigin="anonymous"></script>'
 var LINK_TAG_CSS = '<link type="text/css" href="%s" rel="stylesheet">'
 var LINK_TAG_HTML = '<link href="%s" rel="import">'
 var SCRIPT_TYPE = {
diff --git a/test/unit/middleware/karma.spec.js b/test/unit/middleware/karma.spec.js
@@ -197,7 +197,7 @@ describe('middleware.karma', () => {
 
     response.once('end', () => {
       expect(nextSpy).not.to.have.been.called
-      expect(response).to.beServedAs(200, 'CONTEXT\n<script type="text/javascript" src="/__karma__/absolute/first.js?sha123"></script>\n<script type="application/dart" src="/__karma__/absolute/second.dart?sha456"></script>')
+      expect(response).to.beServedAs(200, 'CONTEXT\n<script type="text/javascript" src="/__karma__/absolute/first.js?sha123" crossorigin="anonymous"></script>\n<script type="application/dart" src="/__karma__/absolute/second.dart?sha456" crossorigin="anonymous"></script>')
       done()
     })
 
@@ -227,7 +227,7 @@ describe('middleware.karma', () => {
 
     response.once('end', () => {
       expect(nextSpy).not.to.have.been.called
-      expect(response).to.beServedAs(200, 'CONTEXT\n<script type="text/javascript" src="/__karma__/absolute/some/abc/a.js?sha"></script>\n<script type="text/javascript" src="/__karma__/base/b.js?shaaa"></script>')
+      expect(response).to.beServedAs(200, 'CONTEXT\n<script type="text/javascript" src="/__karma__/absolute/some/abc/a.js?sha" crossorigin="anonymous"></script>\n<script type="text/javascript" src="/__karma__/base/b.js?shaaa" crossorigin="anonymous"></script>')
       done()
     })
 
@@ -281,7 +281,7 @@ describe('middleware.karma', () => {
     ])
 
     response.once('end', () => {
-      expect(response).to.beServedAs(200, 'CONTEXT\n<script type="text/javascript" src="https://some.url.com/whatever"></script>')
+      expect(response).to.beServedAs(200, 'CONTEXT\n<script type="text/javascript" src="https://some.url.com/whatever" crossorigin="anonymous"></script>')
       done()
     })
 
@@ -344,7 +344,7 @@ describe('middleware.karma', () => {
 
     response.once('end', () => {
       expect(nextSpy).not.to.have.been.called
-      expect(response).to.beServedAs(200, 'DEBUG\n<script type="text/javascript" src="/__karma__/absolute/first.js"></script>\n<script type="text/javascript" src="/__karma__/base/b.js"></script>')
+      expect(response).to.beServedAs(200, 'DEBUG\n<script type="text/javascript" src="/__karma__/absolute/first.js" crossorigin="anonymous"></script>\n<script type="text/javascript" src="/__karma__/base/b.js" crossorigin="anonymous"></script>')
       done()
     })
 
