Blank Screen on iOS Safari 14.3

[Idefix2020]

Does this issue occur when all extensions are disabled?: Yes

• VS Code Version: >=1.66.0
• OS Version: iOS 14.3

Steps to Reproduce:

1. Open Safari on iOS 14.3
2. Navigate to any vscode server (e.g. github.dev, vscode.dev or code-server)

The Safari developer tools console shows the following error:

Unhandled Promise Rejection: ReferenceError: Can't find variable: BigInt64Array

[joaomoreno]

The user is right.

I see references to BigInt64Array in the following commits:

• 4ac1fc2 @rchiodo
• 3499f63 @mjbvz
• 32d40cf @deepak1556 (soft reference)

@jrieken Thoughts?

[connor4312]

As this has been supported since iOS 15, do we want to change this?

[Idefix2020]

The changes introduced in 4ac1fc2 completely break vs code for all devices below iOS/iPadOS 15, the other occurrences of BigInt64Array don't seem to have any negative impact according to my testing (anything below 1.66.0 works). The fix I proposed in #153929 is a more elegant solution that supports all browsers and does not break anything.

[jrieken]

@jrieken Thoughts?

We are generally only aiming for latest and greatest browser version. The use of BigInt64Array seems small enough to justify a special case but we shouldn't target a lower version nor is there any guarantee that other things won't break, e.g "fixing" this might just reveal another bunch of blocker etc pp.

[joaomoreno]

Sounds good, forwarding to @rchiodo to evaluate the PR.