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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. loren schmidt‏ @lorenschmidt 13 Jan 2019
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      weird js unicode question! this works entered directly into the chrome console (left). when i do this in a .js file, it ends up mangled (right 2). is due i think to breaking up a single unicode glyph into two glyphs. does anyone know why it does this? is there a way to fix it?pic.twitter.com/9AHbw1Wk2N

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    2. loren schmidt‏ @lorenschmidt 13 Jan 2019
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      additional information: the right two images are the console output from the .js version, and the .js version as rendered within the chrome debugger. (note: the source itself is identical to the first version)

      3 replies 0 retweets 2 likes
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    3. Fake “Unicode.”  ↙️‏ @FakeUnicode 13 Jan 2019
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      Replying to @lorenschmidt

      What likely is happening is the UTF-8 file is being incorrectly parsed as Windows-1252. U+00A0 NO-BREAK SPACE in UTF-8 is bytes C2 A0 C2 A0 in Windows-1252 is "Â" LATIN CAPITAL LETTER A WITH CIRCUMFLEX + " " NO-BREAK SPACE. Is this a local file or hosted on a server?

      1 reply 0 retweets 2 likes
    4. Fake “Unicode.”  ↙️‏ @FakeUnicode 13 Jan 2019
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      Replying to @FakeUnicode @lorenschmidt

      This isn't uncommon, because so much of the web is in legacy Windows-1252; many browsers assume 1252 if they get confused. And .css/.js being plain text doesn't support tags declaring encoding. One solution is to include a BOM (Byte Order Mark), which kinda forces UTF-8

      3 replies 0 retweets 4 likes
    5. Fake “Unicode.”  ↙️‏ @FakeUnicode 13 Jan 2019
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      Replying to @FakeUnicode @lorenschmidt

      (Purists, including @Unicode, will tell you there is no reason to use a BOM in UTF-8. But this is the one instance where it Just Works™. If you have a remotely hosted .js and the server won't let you force "Content-Type:text/html; charset=UTF-8" header, a BOM will do the trick.)

      1 reply 0 retweets 7 likes
    6. Fake “Unicode.”  ↙️‏ @FakeUnicode 13 Jan 2019
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      Replying to @FakeUnicode @lorenschmidt @unicode

      Can reproduce this locally in Chrome under Linux. foo.htm contains <script src="foo.js">. The locale is even set to "LANG=en_US.UTF-8" but chrome still insists it is Windows-1252 (cc @mathias). The BOM tells Chrome the file is UTF-8 rather than Windows-1252.pic.twitter.com/d1nEruxej1

      2 replies 0 retweets 2 likes
      Mathias Bynens‏Verified account @mathias 13 Jan 2019
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      Replying to @FakeUnicode @lorenschmidt @unicode

      Instead of using a BOM, I recommend explicitly setting <meta charset=utf-8> in your HTML. It affects script elements in the doc as well.

      10:52 PM - 13 Jan 2019
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      • Matthew Phillips 💖 Taudry Hepburn 💖 Bob Loblaw law blog. Haroen Viaene
      2 replies 0 retweets 4 likes
        1.  💖 Taudry Hepburn  💖‏ @tabatkins 14 Jan 2019
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          Replying to @mathias @FakeUnicode and

          And CSS files! (If they don't have a BOM, charset header, or @charset declaration, they'll take the including HTML file's encoding.)

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        1. Henri Sivonen‏ @hsivonen 14 Jan 2019
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          Replying to @mathias @FakeUnicode and

          The BOM affect child resources, too. It's a matter of trading one pitfall (editor silently removing the BOM) for another (someone adding cruft [comments, Facebook bogo-namespaces, IE conditional comments, etc.] to push the meta past the first 1024 bytes).

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