webassembly is not defined on ms-edge in github editor [FIXED]

Question

GitHub code editor (github.dev) on Microsoft Edge browser says the error request initialize failed with message: Webassembly is not defined and also missing syntax highlighting while opening a file (e.g. a simple .cs file)

Answer 1

All you need to do to fix that is to go to the edge settings > privacy, search, and services > scroll down to reach option Enhance your security on the web, and just turn it off (note that you must completely turn it off, not setting it on Balanced or strict.)

or you can create exception:

after that refresh the github and see it working...

hope this saves you time.

Answer 2

As of now (2022.5), the above exceptions list no longer works. Disabling Enhanced Security feature is never an option for me.

Users should add the following sites to exceptions. Mind the [*.] wildcard, it's mandatory.

github.dev
[*.]vscode-webview.net

If you are using vscode.dev, you should add it either

vscode.dev

If you are using VSCode Web insider builds (click Switch to Insider Versions... on bottom-left ), add the following domain.

[*.]vscode-cdn.net

adding github.com is not necessary, the actual workers are not running from this domain.