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mathias's profile
Mathias Bynens
Mathias Bynens
Mathias Bynens
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@mathias

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Mathias BynensVerified account

@mathias

I work on @ChromeDevTools & @v8js at Google and on ECMAScript through TC39. ♥ JavaScript, HTML, CSS, HTTP, performance, security, Bash, Unicode, i18n, macOS.

Munich, Germany
mths.be
Joined January 2007

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    1. Shu-yu Guo (郭纾宇)‏ @_shu 18 Oct 2019
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      JS front end devs using reactive frameworks, how often do you depend on reactivity for a computed property? that is, a property whose name that isn’t known without computation?

      2 replies 0 retweets 5 likes
    2. Justin Fagnani‏ @justinfagnani 18 Oct 2019
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      Replying to @_shu

      Wouldn't a lot of computed properties have known names? When wouldn't they actually?

      2 replies 0 retweets 0 likes
    3. Justin Fagnani‏ @justinfagnani 18 Oct 2019
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      Replying to @justinfagnani @_shu

      Oh, you probably mean computed property names! Sorry 😊 In that case, using symbols for names is very useful. Usually it's for implementing an interface, so I don't have any prior examples of symbol-named reactive properties, but I wouldn't want to prevent it.

      1 reply 0 retweets 0 likes
    4. Justin Fagnani‏ @justinfagnani 18 Oct 2019
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      Replying to @justinfagnani @_shu

      I'm assuming a static decorator with a dynamic name is tricky?

      1 reply 0 retweets 0 likes
    5. Shu-yu Guo (郭纾宇)‏ @_shu 18 Oct 2019
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      Replying to @justinfagnani

      for static decorators computed names are fine, i think. actually thinking about what language-level reactivity might look like. @mathias showed me Svelte’s $: and got me curious. reactivity seems universally beloved in JS. can a language feature help? could it be static-ish?

      2 replies 0 retweets 2 likes
      Mathias Bynens‏Verified account @mathias 18 Oct 2019
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      Replying to @_shu @justinfagnani

      cc @Rich_Harris

      3:34 PM - 18 Oct 2019
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Rich Harris‏Verified account @Rich_Harris 21 Oct 2019
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          Replying to @mathias @_shu @justinfagnani

          the $: operator is incredibly handy, I can't imagine not having it in my toolkit. And building an app without some well-defined approach to reactivity is like pulling teeth. But $: definitely doesn't belong in the language, and I don't imagine it even *could*, since it's

          1 reply 0 retweets 5 likes
        3. Rich Harris‏Verified account @Rich_Harris 21 Oct 2019
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          Replying to @Rich_Harris @mathias and

          predicated on compile-time analysis. A while back I saw a fun proposal (can't remember where) — async/await but for Observables: observable function greet(name) { return `Hello ${observe name}!`; } const name = getObservableSomehow(); const greeting = observe greet(name);

          3 replies 0 retweets 3 likes
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