Why is this?
Can we have local scope variables using 'var'?
Shouldn't Directory Opus be advertised as a file manager And awesome IDE, for increased sales?
Because it’s JScript and those things probably didn’t exist back then.
JScript is part of Windows, not something Opus defines.
From what I've read, it looks like Microsoft abandoned all interest in it, it won't be updated, and it exists for historical compatibility.
That's why it would be neat if Opus in the future would provide a built-in scripting language such as Lua (which is extremely small and easy to integrate, wouldn't bloat Opus at all!). Lua appeared nearly 30 years ago and is still actively developed and is used everywhere for scripting (often in games).
Do you mean 'Microsoft Office JScript' ?
They're all connected but, no. It's part of Windows ActiveScripting, not Office. I don't know how (or whether) Office's JScript differs.
Are the documentations in this post the correct documentations ?
Looks correct, assuming the links still work (Microsoft are terrible at running websites).