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@MozDevNet

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Joined March 2013
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  1. Pinned Tweet
    Aug 12

    Firefox 91 is here! 🦊 🔥 ✔️ The Visual Viewport API is now enabled by default on desktop releases ✔️ Intl.DateTimeFormat object additions 📆 ⏰ ❌ The non-standard -moz-outline-radius property has been removed 🔒 Gamepad API is now protected

    21 retweets 70 likes
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  2. 20 hours ago

    Deno web compat is now on MDN! 🎉

    Web compatibility data for Deno is now available on .
    5 retweets 57 likes
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  3. Aug 19

    We have ~11k active pages on MDN, so keeping them up to date is a big task! details how we’re cleaning up and archiving some content.

    2 replies 3 retweets 23 likes
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  4. Aug 18

    🎉 👏🏽👏🏽

    Just got my first MDN docs PR approved 🎉
    15 likes
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  5. Aug 18

    This. 💯

    Replying to @metaskills
    pro tip, search for "mdn <topic>" to get to the excellent Mozilla developer docs
    2 replies 7 retweets 36 likes
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  6. Aug 14

    We have some really good JS docs:

    Tech Twitter, In your opinion, what's the best / ideal course to start learning JavaScript from scratch? Asking this on behalf of all the JS beginners!
    Show this thread
    1 reply 6 retweets 84 likes
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  7. Aug 12

    1 reply 7 retweets 40 likes
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  8. Retweeted
    Aug 4

    How MDN's autocomplete search works - Mozilla Hacks - the Web developer blog by via

    19 retweets 35 likes
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  9. Aug 3

    . and recently added an autocomplete search to MDN Web Docs, that allows you to quickly jump straight to the document you’re looking for by typing parts of the document title. *Spoiler Alert* very cool “easter egg” feature included

    2 replies 14 retweets 51 likes
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  10. Retweeted
    Aug 2

    Closures are really important in and we are often asked about them in interviews. It's very detailed topic but not difficult to understand so below are some key points about closures and functional scopes⏬. Ref: by

    4 retweets 13 likes
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  11. Jul 30

    Read… yes, but also pay it forward and contribute one day or one year. No coding required, just bring a passion for building a great community open to all. 👉🏽

    Read MDN docs and EJS to know JavaScript. Read open source libraries to learn its usage. You use Dictionaries and Grammar to understand the language but you can only appreciate it when you read poetry. Open Source Libs are code poetry. ❤️
    1 retweet 17 likes
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  12. Retweeted
    Jul 28

    How many years of coding JavaScript now? And today I discovered Number.isFinite(). Been around since Firefox 16 apparently.

    1 reply 2 retweets 22 likes
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  13. Retweeted
    Jul 28

    CSS is amazing. I am sad that it seems so undervalued at times. Many of the most senior programmers I know can't grasp it. If you can, know that you are amazing. And there are jobs for you. Try design systems. It welcomes you! 💜💜💜

    sometimes it feels like i’m not capable of higher-level programming since i tend to default to css
    Show this thread
    7 replies 34 retweets 336 likes
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  14. Jul 27

    No shame.. and not limited to JS 🤣 “How to…. MDN”

    Who else searches stupid JavaScript questions in Incognito mode because you don't want anyone to know how bad you are? 😅
    1 reply 4 retweets 38 likes
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  15. Retweeted
    Jul 25

    TIL tagged templates 🤯 Always wondered how they handle styled.div`` syntax in styled-components

    5 replies 6 retweets 46 likes
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  16. Retweeted
    Jul 26

    TIL: You can use "optional chaining" in JavaScript, a concise way to access "values through connected objects when it's possible that a reference or function may be undefined or null." Looks like: obj.mightBeNullish?.plzDontBork

    2 replies 4 retweets 27 likes
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  17. Retweeted
    Jul 25

    I just love the reference to the movie Gremlins and the mogwai at

    3 retweets 17 likes
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  18. Retweeted
    Jul 21

    If you have not noticed, you can now get instant, title based search results on . Just start typing into the search bar. Thanks to and among all the other folks that made this happen 🥳

    1 reply 3 retweets 21 likes
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  19. Jul 20

    Last year we announced that we would be managing MDN content from a repository on Since then, we have determined that MDN accounts are no longer functional for users. Want to edit or contribute content? You need to sign in to GitHub, not MDN.

    1 reply 9 retweets 58 likes
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  20. Jul 13

    Firefox 90 is here! 🔥 🦊 ✔️ Private class static and instance fields and methods are now supported by default ✔️ The HTTP fetch metadata request headers (Sec-Fetch-*) are now supported ❌ FTP has now been removed from Firefox

    3 replies 17 retweets 120 likes
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