Fonts are not loaded in IE11 with built app

Is this a bug report?

Yes

Did you try recovering your dependencies?

Yes

Which terms did you search for in User Guide?

fonts

Environment

Environment: OS: macOS High Sierra 10.13.4 Node: 8.9.4 Yarn: 1.6.0 npm: 5.6.0 Watchman: Not Found Xcode: Not Found Android Studio: Not Found

Packages: (wanted => installed) react: ^16.4.0 => 16.4.0 react-dom: ^16.4.0 => 16.4.0 react-scripts: 1.1.4 => 1.1.4

Steps to Reproduce

1. Create a new project with create-react-app
2. Add a font in the src/font dir
3. Add the necessary CSS to use this font using @font-face in index.css like in this example:

@font-face {
    font-family: 'OpenSans-Regular';
    src: url('./fonts/OpenSans/OpenSans-Regular-webfont.eot?#iefix') format('embedded-opentype'),
         url('./fonts/OpenSans/OpenSans-Regular-webfont.woff') format('woff');
    font-weight: normal;
    font-style: normal;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'OpenSans-Regular', sans-serif;
}

1. Run yarn start and open http://localhost:3000 in Internet Explorer 11 (using a VM may be a nice idea) and check that your font is used for the text (this is the expected behavior).
2. Stop the process and run yarn build
3. Run the built page by running serve -s build
4. Open http://localhost:3000 with Chrome, Firefox, etc. You will see that the used font is OpenSans
5. Now open the same URL with Internet Explorer 11.

Expected Behavior

IE11 should display the text with the OpenSans font when the project is built.

Actual Behavior

The OpenSans font is not downloaded and the text is shown as sans-serif.

IE 11 (see how the text is rendered):

Chrome:

Reproducible Demo

I created a repository to show the problem here: https://github.com/michaelperrin/create-react-app-font-problem. Steps to reproduce:

1. Clone my demo repo: git clone https://github.com/michaelperrin/create-react-app-font-problem.git
2. Run the following commands:

 yarn global add serve
 yarn build
 serve -s build

1. Open http://localhost:3000 with Chrome, Firefox, etc. You will see that the used font is OpenSans
2. Now open the same URL with Internet Explorer 11 (using a VM may be a nice idea).

A few notes:

• This is not due to the fact that you are running the project on localhost (I hosted it on a server and got the same problem).
• This is not due to font formats (IE11 does support EOT files).
• This happens with any font.
• This is not due to security parameters of IE11 (font download is enabled).
• I hope I didn’t miss something and that this is an actual bug 😉

[raffaeu]

Well your team has to start fixing the bug, surely by closing the issue you are not addressing the problem

Sent from my Mobile

On Thu, 6 Dec 2018, 11:37 stale[bot] <[e-mail] wrote:

This issue has been automatically marked as stale because it has not had any recent activity. It will be closed in 5 days if no further activity occurs.

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[nemanja-stojanovic-mqsoftrs]

Same problem as @raffaeu. Built version of create-react-app doesn’t show correct fonts in IE11. I also use Ant Design for styling. Adding meta tags doesn’t work for me.