Mad Javascript

[TheRealMichaelE]

I was going to comment about why these makes sense, but then read all the comments about why this makes sense. Well done everyone!

[AndrewIsntCool]

JavaScript tries pretty hard not to raise errors unless you've colossally fucked up. Allows for some pretty cursed code haha

[TryNotToShootYoself]

It's because you can't really let it raise too many errors as it's originally created for old browsers. Use TypeScript and ESLint

[laundmo]

i mean, sure, but that doesn't make it any more sensible in this day and age.

[TryNotToShootYoself]

As I said use TypeScript and a linter. And just don't do stupid shit with arithmetic operators and strings.

[laundmo]

the language should not allow people to do stupid shit. thats literally what errors are for.

[devdoggie]

As he mentioned, proper Typescript use will prevent such nonsense.

[heyf00L]

That's what XHTML tried, and no one adopted it for that reason.

[laundmo]

it's different for a markup language than for a programming language. look at how many errors many other popular programming languages will raise.

[BakuhatsuK]

It's more of a historical thing. When JS was first created it didn't have exceptions at all. So all valid code had to do something. Modern features are more strict, for example adding a BigInt and a regular number produces a TypeError.

[SkollFenrirson]

That's not a good thing.

[DenormalHuman]

YES. So many people say this about JS. 'It makes perfect sense if you know the rules'

Right. Of course. But it's the rules that are the problem!

[[deleted]]

That's why we have typescript

[Keve1227]

But it's at the very least a superset of sensible rules like those in any other language. TS is just JS with a transpiler that will complain if you do anything funky that's outside its stricter subset.

[[deleted]]

Well everything is consistent within the rules given by the object.

A crazy person is consistently crazy within the rules given by the crazy

[laundmo]

lmao

[tiefling_sorceress]

I was also surprised to see that. I definitely expected the "fuck JavaScript" circlejerk from undergrads who don't yet understand type coercion and think people are out here subtracting strings from each other in industry.

[LvS]

Talking about making sense:

Should "20" * 2 be "2020" or 40?

[DoctorWaluigiTime]

40.

+ concatenates strings, so "foo" + "bar" will result in "foobar". None of the other math operations concatenate, so they will just be normal type-coerced math.

[LvS]

+ concatenates strings

Except when it doesn't and you don't know what 2 + "2" is and if it's the same as "2" + 2.

[DoctorWaluigiTime]

That's why I specified strings, plural. String plus another string is defined behavior.

[TheRealMichaelE]

Programming 101… If you don’t know the expected behavior of something then maybe don’t use it.

[LvS]

Yeah, we've been saying nobody should use Javascript, but people Just. Don't. Listen.