Damn tho the transpilation in #1 seems unnecessarily bloated
Shouldn't it just be ...
/cc @left_padpic.twitter.com/E5PCMAKfTO
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Damn tho the transpilation in #1 seems unnecessarily bloated
Shouldn't it just be ...
/cc @left_padpic.twitter.com/E5PCMAKfTO
TypeScript does the same thing as Babel. Did `== null` stop being the idiomatic "check for null or undefined" in JS??
/cc @drosenwasser - those bundle paper cuts will add up 
It's still idiomatic, but it's not technically correct--document.all == null but it's not null or undefined. (Maybe this is what loose mode transforms are for? I don't know what the current best practice is.)
How does that document.all thing work? It seems to violate the spec, at a glance.
There's a special carve-out for it, added in 2017 (since browsers needed to implement that behavior anyway for web compat, might as well spec it): https://tc39.es/ecma262/#sec-IsHTMLDDA-internal-slot …
Did Mozilla ever match this bizarre IE-ism? Cc: @bz_moz
Yes, and like the other reply said, you wrote the patch. ;)
https://bugzilla.mozilla.org/attachment.cgi?id=152157&action=edit … I guess the actual "use that for document.all" bit was jst in https://bugzilla.mozilla.org/attachment.cgi?id=153679&action=edit … (see the JSRESOLVE_DETECTING checks there).
I was perp of DETECTING but it did not create a new value that is not == null or undefined.
Ah, so... The initial impl in Mozilla only did the "if (document.all)" thing: made it test false, while document.all would be an object in practice. Then later when we tried to harmonize this across browsers, the magic "object == null" thing was an easier sell than DETECTING
Standardizing DETECTING would have been exciting. ;)
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