From 2bb4e3691cc79ea7d46096c6cf154e5f3acc82af Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Usarz?= <lukasz.usarz@gmail.com>
Date: Tue, 15 May 2018 18:01:28 +0200
Subject: [PATCH] fix: remove support of jsVersion configuration property
 (#3002)

Fixes #2911
---
 docs/config/01-configuration-file.md | 12 ------------
 lib/middleware/karma.js              | 26 --------------------------
 test/client/karma.conf.js            |  2 --
 test/e2e/tag.feature                 |  3 ---
 4 files changed, 43 deletions(-)

diff --git a/docs/config/01-configuration-file.md b/docs/config/01-configuration-file.md
index 8b40bbc49..a2bb5f5bb 100644
--- a/docs/config/01-configuration-file.md
+++ b/docs/config/01-configuration-file.md
@@ -794,18 +794,6 @@ All of Karma's urls get prefixed with the `urlRoot`. This is helpful when using
 sometimes you might want to proxy a url that is already taken by Karma.
 
 
-## jsVersion
-**Type:** Number
-
-**Default:** `0`
-
-**Description:** The JavaScript version to use in the Firefox browser.
-
-If `> 0`, Karma will add a JavaScript version tag to the included JavaScript files.
-
-Note: This will only be applied to the Firefox browser up to version 58. Support for JavaScript version was [removed](https://bugzilla.mozilla.org/show_bug.cgi?id=1428745) in Firefox 59. This property is deprecated and will be removed in the next major release of Karma.
-
-
 [plugins]: plugins.html
 [config/files]: files.html
 [config/browsers]: browsers.html
diff --git a/lib/middleware/karma.js b/lib/middleware/karma.js
index 4d8d0ea3a..b9d06fcfc 100644
--- a/lib/middleware/karma.js
+++ b/lib/middleware/karma.js
@@ -14,7 +14,6 @@
 var path = require('path')
 var util = require('util')
 var url = require('url')
-var useragent = require('useragent')
 var _ = require('lodash')
 
 var log = require('../logger').create('middleware:karma')
@@ -72,17 +71,6 @@ var getXUACompatibleUrl = function (url) {
   return value
 }
 
-var isFirefox = function (req) {
-  if (!(req && req.headers)) {
-    return false
-  }
-
-  // Browser check
-  var firefox = useragent.is(req.headers['user-agent']).firefox
-
-  return firefox
-}
-
 var createKarmaMiddleware = function (
   filesPromise,
   serveStaticFile,
@@ -99,7 +87,6 @@ var createKarmaMiddleware = function (
     var customContextFile = injector.get('config.customContextFile')
     var customDebugFile = injector.get('config.customDebugFile')
     var customClientContextFile = injector.get('config.customClientContextFile')
-    var jsVersion = injector.get('config.jsVersion')
     var includeCrossOriginAttribute = injector.get('config.crossOriginAttribute')
 
     var requestUrl = request.normalizedUrl.replace(/\?.*/, '')
@@ -221,19 +208,6 @@ var createKarmaMiddleware = function (
             var scriptFileType = (fileType || fileExt.substring(1))
             var scriptType = (SCRIPT_TYPE[scriptFileType] || 'text/javascript')
 
-            // In case there is a JavaScript version specified and this is a Firefox browser
-            if (jsVersion && jsVersion > 0 && isFirefox(request)) {
-              var agent = useragent.parse(request.headers['user-agent'])
-
-              log.warn('jsVersion configuration property is deprecated and will be removed in the next major release of Karma.')
-
-              if (agent.major < 59) {
-                scriptType += ';version=' + jsVersion
-              } else {
-                log.warn('jsVersion is not supported in Firefox 59+ (see https://bugzilla.mozilla.org/show_bug.cgi?id=1428745 for more details). Ignoring.')
-              }
-            }
-
             var crossOriginAttribute = includeCrossOriginAttribute ? CROSSORIGIN_ATTRIBUTE : ''
             scriptTags.push(util.format(SCRIPT_TAG, scriptType, filePath, crossOriginAttribute))
           }
diff --git a/test/client/karma.conf.js b/test/client/karma.conf.js
index 1ffff3041..4422ca7cb 100644
--- a/test/client/karma.conf.js
+++ b/test/client/karma.conf.js
@@ -156,8 +156,6 @@ module.exports = function (config) {
 
     forceJSONP: true,
 
-    jsVersion: 0,
-
     browserStack: {
       project: 'Karma'
     }
diff --git a/test/e2e/tag.feature b/test/e2e/tag.feature
index 63c3ff35a..960fa0f10 100644
--- a/test/e2e/tag.feature
+++ b/test/e2e/tag.feature
@@ -8,7 +8,6 @@ Feature: JavaScript Tag
       """
       files = ['tag/tag.js', 'tag/test-with-version.js'];
       browsers = ['Firefox']
-      jsVersion = 1.8
       plugins = [
         'karma-jasmine',
         'karma-firefox-launcher'
@@ -26,7 +25,6 @@ Feature: JavaScript Tag
       """
       files = ['tag/tag.js', 'tag/test-with-version.js'];
       browsers = ['Chrome'];
-      jsVersion = 1.8;
       plugins = [
         'karma-jasmine',
         'karma-chrome-launcher'
@@ -72,4 +70,3 @@ Feature: JavaScript Tag
       .
       Chrome
       """
-      
\ No newline at end of file