6 ms·

What’s new in JavaScript [video]

G4BB3R 8y ago
I miss pattern matching, and let...in expression, because arrow function without it doesn't make much sense.
- cztomsik 8y ago
  pattern matching in dynamically typed language would be very very limited and don't forget that you also have very little time to parse and run the app (time to interactive) it really doesnt make much sense - just compile to js if you can't live without it
  - jelder 8y ago
    Ruby’s pattern matching is incredibly elegant and useful. It can definitely be done in a dynamic language.
  - mercer 8y ago
    Could you elaborate? Elixir is dynamically typed and makes heavy use of pattern matching (or does it?).
zaphirplane 8y ago
I don’t get the point of these posts, it’s to me a random person’s YouTube post there is no credibility or kudos attached and I’m not going to watch it to find out At least with a blog post which is the text equivalent. I can skim it to see Are these videos the equivalent of ad click bait
- tambourine_man 8y ago
  >…a random person’s YouTube post It’s from Google I/O 2019.
  - zaphirplane 8y ago
    That isn’t clear till you watch it Which is my issue with these YouTube links
nikkwong 8y ago
Disheartening to see Safari lagging so terribly behind; there are some standardized web APIs that are a decade old that Safari still hasn't implemented. Because of this my new shiny web app [0] doesn't support Safari at all (!!!) which disturbs the hell out of me (if anyone has a reliable workaround for setPointerCapture, I'd love to hear about it). It's further disheartening to see them implementing hardly any of the features mentioned in this talk, which means these APIs are unavailable to all developers since their OS's are so ubiquitous. It surely isn't a capital constraint issue; Apple is the most well-funded among browser vendors, so it begs the question as to why they are letting their browser fall behind. It will be interesting to see if they decide to start lending more resources towards the browser or continue to deliver a subpar experience; which seems quite contrary to their core competencies. Cheers for Microsoft under Satya for taking the hard stance and determining they did not want to devote the resources to Edge and ceding in a way that will ultimately deliver a good experience for Windows users under a chromium based browser. Although I'm concerned about the openness of the web; as a developer my foremost concern is that I can deliver a good experience to my users and their decision allows me to deliver on that front. [0] www.blendful.com
- glasshead969 8y ago
  WebKit has pointer events in active development, so I expect setPointerCapture in safari soon.
  - nikkwong 8y ago
    Good to hear, and can't wait. It had been so long that I thought that they decided that they wouldn't bother.
    - glasshead969 8y ago
      They were against the pointer events spec when it was proposed I guess they changed their mind.
- sieabahlpark 8y ago
  As the story goes Safari is the new IE
cztomsik 8y ago
I'm bit worried about what will happen with private fields. One the really cool things about javascript was that there was always some way to monkey-patch everything.
stareatgoats 8y ago
Interesting, happy about the performance gains. Some other news are critical corrections to awful JS faults (bigints calculations ...), some other items look to be helpful. But I've so far not been happy at all about the cognitive mess which is async/await and promises, just to avoid callback hell AFAICS. Maybe these changes could alleviate that.
- Stevvo 8y ago
  For me async/await does nothing but alleviate cognitive load. It does require a solid understanding of Promises but once you have that it makes asynchronous code so easy.
  - sieabahlpark 8y ago
    I think async/await lets you make less performant code strangely enough because it _looks_ like good synchronous logic
craftoman 8y ago
I think JavaScript is the most progressive language ever existed. Look how it started and how it evolved over time. Decorators will be supported too in the next month. Speaking generally, JavaScript should be categorized as OOP language
rinchik 8y ago
hash symbol for privates is an abomination! What is really upsetting (it was discussed countless times) is that there's no way around it because JS internals are a hot mess. (╯°□°）╯︵ ┻━┻
- sieabahlpark 8y ago
  Why they couldn't just add the keyword in the class like typescript I'll never know.

I miss pattern matching, and let...in expression, because arrow function without it doesn't make much sense.

cztomsik 8y ago
pattern matching in dynamically typed language would be very very limited and don't forget that you also have very little time to parse and run the app (time to interactive) it really doesnt make much sense - just compile to js if you can't live without it
- jelder 8y ago
  Ruby’s pattern matching is incredibly elegant and useful. It can definitely be done in a dynamic language.
- mercer 8y ago
  Could you elaborate? Elixir is dynamically typed and makes heavy use of pattern matching (or does it?).

I don’t get the point of these posts, it’s to me a random person’s YouTube post there is no credibility or kudos attached and I’m not going to watch it to find out At least with a blog post which is the text equivalent. I can skim it to see Are these videos the equivalent of ad click bait

tambourine_man 8y ago
>…a random person’s YouTube post It’s from Google I/O 2019.
- zaphirplane 8y ago
  That isn’t clear till you watch it Which is my issue with these YouTube links

nikkwong 8y ago

Disheartening to see Safari lagging so terribly behind; there are some standardized web APIs that are a decade old that Safari still hasn't implemented. Because of this my new shiny web app [0] doesn't support Safari at all (!!!) which disturbs the hell out of me (if anyone has a reliable workaround for setPointerCapture, I'd love to hear about it). It's further disheartening to see them implementing hardly any of the features mentioned in this talk, which means these APIs are unavailable to all developers since their OS's are so ubiquitous. It surely isn't a capital constraint issue; Apple is the most well-funded among browser vendors, so it begs the question as to why they are letting their browser fall behind. It will be interesting to see if they decide to start lending more resources towards the browser or continue to deliver a subpar experience; which seems quite contrary to their core competencies. Cheers for Microsoft under Satya for taking the hard stance and determining they did not want to devote the resources to Edge and ceding in a way that will ultimately deliver a good experience for Windows users under a chromium based browser. Although I'm concerned about the openness of the web; as a developer my foremost concern is that I can deliver a good experience to my users and their decision allows me to deliver on that front. [0] www.blendful.com

glasshead969 8y ago
WebKit has pointer events in active development, so I expect setPointerCapture in safari soon.
- nikkwong 8y ago
  Good to hear, and can't wait. It had been so long that I thought that they decided that they wouldn't bother.
  - glasshead969 8y ago
    They were against the pointer events spec when it was proposed I guess they changed their mind.
sieabahlpark 8y ago
As the story goes Safari is the new IE

cztomsik 8y ago

I'm bit worried about what will happen with private fields. One the really cool things about javascript was that there was always some way to monkey-patch everything.

stareatgoats 8y ago

Interesting, happy about the performance gains. Some other news are critical corrections to awful JS faults (bigints calculations ...), some other items look to be helpful. But I've so far not been happy at all about the cognitive mess which is async/await and promises, just to avoid callback hell AFAICS. Maybe these changes could alleviate that.

Stevvo 8y ago
For me async/await does nothing but alleviate cognitive load. It does require a solid understanding of Promises but once you have that it makes asynchronous code so easy.
- sieabahlpark 8y ago
  I think async/await lets you make less performant code strangely enough because it _looks_ like good synchronous logic

craftoman 8y ago

I think JavaScript is the most progressive language ever existed. Look how it started and how it evolved over time. Decorators will be supported too in the next month. Speaking generally, JavaScript should be categorized as OOP language

rinchik 8y ago

hash symbol for privates is an abomination! What is really upsetting (it was discussed countless times) is that there's no way around it because JS internals are a hot mess. (╯°□°）╯︵ ┻━┻

sieabahlpark 8y ago
Why they couldn't just add the keyword in the class like typescript I'll never know.