Dev server syntax error in IE11

Versions

Angular CLI: 1.6.5 Node: 8.9.1 OS: win32 x64 Angular: 5.2.1 Internet Explorer: 11

Which pulls in: webpack-dev-server: 2.11.0

Repro steps

$ng new app
$cd app
$npm start

Navigate to http://localhost:4200 using IE11

Observed behavior

IE11 reports syntax error in console:

SCRIPT1002: Syntax error
vendor.bundle.js (43208,21)

The AOT production build is fine. Just the dev server which is a problem

Desired behavior

Be able to use dev server with IE11

Mention any other details that might be useful (optional)

The cause seems to be fat arrow es6 syntax that has sneaked into the webpack-dev-server output. See here: https://github.com/webpack/webpack-dev-server/issues/1278

So probably this will be fixed with the next update to webpack-dev-server

[ayush987goyal]

The above commands returns ^3.0.0 but I am still having trouble. I have opened a issue for the same #9310

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