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sebmck's profile
Sebastian
Sebastian
Sebastian
Verified account
@sebmck

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SebastianVerified account

@sebmck

JavaScript boy and “lovely thoughtleader” ⌨️ he/him ♂️

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Joined April 2011

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    1. Sebastian‏Verified account @sebmck 9 Mar 2017
      • Report Tweet
      • Report NetzDG Violation

      Is Object.freeze on an object enough to ensure security/integrity when sharing an object across multiple realms? ie. no way to modify.

      7 replies 3 retweets 6 likes
    2. Bradley Farias‏ @bradleymeck 9 Mar 2017
      • Report Tweet
      • Report NetzDG Violation
      Replying to @sebmck

      for 1 level deep? yes, but they might still access variables / crawl prototype chain and mutate the origin realm

      1 reply 0 retweets 2 likes
    3. Bradley Farias‏ @bradleymeck 9 Mar 2017
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      Replying to @bradleymeck @sebmck

      (obj_from_other_realm).toString.constructor("console.log('awwww yea')")

      1 reply 0 retweets 3 likes
    4. Bradley Farias‏ @bradleymeck 9 Mar 2017
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      Replying to @bradleymeck @sebmck

      approaches to happily send data across realms: Proxy membrane, freeze(create(null)) as ref, strings (JSON/URL.createObjectURL)

      1 reply 0 retweets 0 likes
    5. Justin Fagnani‏ @justinfagnani 9 Mar 2017
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      Replying to @bradleymeck @sebmck

      has anyone published a generic Proxy membrane yet? And can they really not be pierced?

      2 replies 0 retweets 1 like
    6. Sebastian‏Verified account @sebmck 9 Mar 2017
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      Replying to @justinfagnani @bradleymeck

      either of you know of any reference implementations? trying to write one and am having a lot of trouble

      2 replies 0 retweets 0 likes
    7. Justin Fagnani‏ @justinfagnani 9 Mar 2017
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      Replying to @sebmck

      no, but if you can put some code up I can take a look. I wrote smthng similar for Dart<->JS interop, but w/o Proxies. @bradleymeck

      1 reply 0 retweets 5 likes
      Sebastian‏Verified account @sebmck 10 Mar 2017
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      Replying to @justinfagnani @bradleymeck

      ended up giving up. considering freezing all host objects i give to another realm and removing properties from..

      7:18 AM - 10 Mar 2017
      1 reply 0 retweets 0 likes
        1. New conversation
        1. Sebastian‏Verified account @sebmck 10 Mar 2017
          • Report Tweet
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          Replying to @sebmck @justinfagnani @bradleymeck

          host realm like Function.prototype.constructor, and freezing all built-ins. not sure if that's reliable/safe?

          1 reply 0 retweets 0 likes
        2. Bradley Farias‏ @bradleymeck 10 Mar 2017
          • Report Tweet
          • Report NetzDG Violation
          Replying to @sebmck @justinfagnani

          see https://github.com/FUDCo/proposal-frozen-realms … , this is *not* Node compat though until https://github.com/nodejs/node/issues/6283 … is done

          0 replies 1 retweet 1 like
          3. End of conversation

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