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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. Nicolás Bevacqua‏ @nzgb 14 May 2018
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      Replying to @jakehamiltondev @mathias

      import/export are static statements though

      1 reply 0 retweets 5 likes
    2. Jake Hamilton‏ @jakehamiltondev 14 May 2018
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      Replying to @nzgb @mathias

      I'm not sure I understand what you mean by that. How would you know to use cjs or es modules without parsing the file?

      1 reply 0 retweets 0 likes
    3.  🦠‏ @jhlagado 14 May 2018
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      Replying to @jakehamiltondev @nzgb @mathias

      Parse until the first import or export. It's really not that hard.

      2 replies 0 retweets 6 likes
    4. Mathias Bynens‏Verified account @mathias 14 May 2018
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      Replying to @jhlagado @jakehamiltondev @nzgb

      Not having to parse at all seems simpler, no?

      3 replies 0 retweets 14 likes
    5.  🦠‏ @jhlagado 14 May 2018
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      Replying to @mathias @jakehamiltondev @nzgb

      This is not simpler no. File extensions are a terrible way to detect the type of anything.

      1 reply 0 retweets 8 likes
    6. Mathias Bynens‏Verified account @mathias 14 May 2018
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      Replying to @jhlagado @jakehamiltondev @nzgb

      Why? Node.js has been doing it from the start. Compare e.g. require('a.json') vs. require('b.js').

      2 replies 0 retweets 0 likes
    7. Bradley Farias‏ @bradleymeck 14 May 2018
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      Replying to @mathias @jhlagado and

      Not just Node, MIME DBs usually use file extensions

      1 reply 0 retweets 0 likes
    8.  🦠‏ @jhlagado 14 May 2018
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      Replying to @bradleymeck @mathias and

      Infrastructure usually detects the mime types by more than simply looking at extensions. Should you trust that an image is a jpeg just because it says it is? Detection > TakingOnFaith

      1 reply 0 retweets 0 likes
    9. Bradley Farias‏ @bradleymeck 14 May 2018
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      Replying to @jhlagado @mathias and

      /me stares at all sorts of libraries in languages for MIME and file formats with conflicting/no header

      1 reply 0 retweets 0 likes
    10.  🦠‏ @jhlagado 14 May 2018
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      Replying to @bradleymeck @mathias and

      The most important file types on the web can be detected by looking at the first dozen bytes or so. Why trust the extension only (or at all)?

      2 replies 0 retweets 0 likes
      Mathias Bynens‏Verified account @mathias 14 May 2018
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      Replying to @jhlagado @bradleymeck and

      On the web, the extension doesn’t matter at all. <script type=module> tells the browser it is a module, and if the MIME type checks out, that’s all it needs. Node.js lacks <script> and thus needs another signal, and it doesn’t have MIME types. https://www.youtube.com/watch?v=mIWCLOftfRw&list=PLNYkxOF6rcIC4NQeXpdAy0RbOACI66Hvf&index=12&t=8m08s ….

      3:55 PM - 14 May 2018
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      • 🦠 Jake Hamilton
      1 reply 0 retweets 2 likes
        1. New conversation
        2.  🦠‏ @jhlagado 14 May 2018
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          Replying to @mathias @bradleymeck and

          Sure. But this solution means that we no longer have a symmetrical situation. *.mjs will become the default file extension for all module js files even those will consumed by browsers.

          1 reply 0 retweets 0 likes
        3.  🦠‏ @jhlagado 14 May 2018
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          Replying to @jhlagado @mathias and

          File extensions may mean "nothing" on the web but adding a new one still seems to me a high price to pay for what is essentially a hack.

          1 reply 0 retweets 0 likes
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