HTML5(?) issue Topic is solved

[esgwpl]

https://magcius.github.io/xplain/article/x-basics.html
I'm on Arch Linux using the 64-bit 27.9.2 binary from https://linux.palemoon.org/download/mainline/ and I can't seem to get the interactive elements of the above page to work, I tried starting Pale Moon with a clean profile and tried downgrading to 27.8.3 to no avail.
The page is supposed to generate an X server inside an HTML5 canvas that you can interact with for learning purposes, I tried using Firefox and everything seems to work fine there.

[Isengrim]

I see this in the web console (which you can open using Ctrl+Shift+K):

Code: Select all

SyntaxError: invalid for/in left-hand side article.js:44:13
SyntaxError: invalid for/in left-hand side region.js:27:13
SyntaxError: class is a reserved identifier client-util.js:13:31
SyntaxError: class is a reserved identifier server.js:22:4
SyntaxError: class is a reserved identifier inspector.js:9:4
SyntaxError: class is a reserved identifier demo-common.js:41:31
SyntaxError: class is a reserved identifier x-basics.js:61:4

I'm not sure what the first two messages are, though I have seen them before.
The remaining five tell me that this website is using ES6 JavaScript classes, which are not supported in Pale Moon 27. However, the class syntax will be supported in Pale Moon 28 when it is released later this year, and is currently supported in the latest release of Basilisk.

[vannilla]

The "for/in" errors are caused by the for...of statement: https://developer.mozilla.org/en-US/doc ... s/for...of
It seems to be unsupported in Pale Moon, or anyway in an incomplete way.