• Operating System: macOS 10.12.6
• Node Version: v7.10.0
• NPM Version: 4.2.0
• webpack Version: 2.7.0
• webpack-dev-server Version: 2.8.2

• This is a feature request
• This is a bug

Code

Sample code here

Expected Behavior

Using the eval-source-map option for devtool should not affect the ability to render the page.

Actual Behavior

With version 2.8.x it seems like specifying eval-source-map for devtool is causing an error that is preventing rendering on Safari on Mac and iOS. Rendering seems fine on Chrome/Firefox, but when loading the page in Safari I'm getting:

ReferenceError: Can't find variable: SockJS

I suspect something in the "Cleanup Effort" commit might have broke this but haven't identified what. Maybe something to do with uglifyJS plugin being added

How can we reproduce the behavior?

The gist has a complete code sample that exhibits the issue:

1. Download the gist code.
2. npm install
3. npm start
4. Load localhost:8000 in Safari and open dev tools console to see error. Notice the page doesn't render either.
5. Kill the npm start
6. Open webpack.config.js and remove devtool: 'eval-source-map'.
7. npm start
8. Load localhost:8000 in Safari and notice it now renders and the dev tools console is clean.