www.weightwatchers.com trying to load in TextareaAutosize.js:57:4

[miquelvir]

• The issue is present in the latest release.
• I have searched the issues of this repository and believe that this is not a duplicate.

Current Behavior 😯

This odd page (https://www.weightwatchers.com/us/) tries to load. Is this expected behaviour?

Content Security Policy: The page’s settings blocked the loading of a resource at data:image/svg+xml,<svg xmlns="https://www.weightwatchers.com/us/… (“default-src”). TextareaAutosize.js:57:4

https://www.weightwatchers.com/us should probably not be loaded from TextareaAutosize.

Steps:

1. Create app with create-react-app
2. Use a TextareaAutosize
3. Create the production static build files
4. Use a CSP which blocks images outside your domain
5. Observe how "https://www.weightwatchers.com/us/" tries to load, an error message will appear in the console due to the CSP blocking it.

Context 🔦

Your Environment 🌎

Using Firefox.

`npx @material-ui/envinfo`

System:
OS: Linux 5.8 Ubuntu 20.04.1 LTS (Focal Fossa)
Binaries:
Node: 10.19.0 - /usr/bin/node
Yarn: 1.22.5 - /usr/bin/yarn
npm: 6.14.4 - /usr/bin/npm
Browsers:
Chrome: 87.0.4280.88
Firefox: 84.0.2
npmPackages:
@emotion/react: ^11.1.4 => 11.1.4
@emotion/styled: ^11.0.0 => 11.0.0
@material-ui/core: ^4.11.2 => 4.11.2
@material-ui/icons: ^4.9.1 => 4.11.2
@material-ui/lab: ^4.0.0-alpha.57 => 4.0.0-alpha.57
@material-ui/styles: ^4.11.2 => 4.11.2
@material-ui/system: 4.11.2
@material-ui/types: 5.1.0
@material-ui/utils: 4.11.2
@types/react: 17.0.0
react: ^17.0.1 => 17.0.1
react-dom: ^17.0.1 => 17.0.1
styled-components: ^5.2.1 => 5.2.1

[oliviertassinari]

@miquelvir Do you have a reproduction? It looks like it's coming from one of your addons.

[miquelvir]

I don't have any add-ons; although still probably there is something wrong at my end. However, I have noticed that it does not appear in Chrome.

This only happens with the build files. What is the preferred way to allow you to reproduce this? Should I upload the build files? Or is there some way which is better?

[oliviertassinari]

A live version would be ideal