Mozilla Developer Newsletter
MDN is 15!
MDN 15th anniversary
On July 23, MDN Web Docs turns 15 years old. In the last five years, we have broken a lot of new ground, with around 15 million views per month, a comprehensive browser compatibility database, an active beginner’s learning community, editable interactive examples, and more.
Read More . . .




Special 15th Anniversary Swag!
MDN 15th anniversary merch

To celebrate with us, get some 15th anniversary swag (available for a limited time) or a free videoconference background from our Developer Portal.

As a special thank you to our supporters in the EU, we're able to offer 15% off MDN swag in the EU shop until the end of July.

(Due to COVID-19 and limited production capacities, promotions in other shops are temporarily unavailable).
MDN 15th anniversary merch

Looking for a product and design combination that isn't already available, like the MDN dino on a duffel bag? Try our customize tool and get exactly what you're looking for.

Get MDN 15th Anniversary Swag →

Learn Front-End Development—Including Client-Side JavaScript Frameworks

Earlier this year, MDN launched the front-end developer learning pathway, which includes tutorials for the React, Ember, and Vue JavaScript frameworks.

Whether you're just starting out on your journey as a web developer or want to pick up a framework you haven't tried before, here's something for you to grow on.

Learn Front-End Web Development →
Learn JavaScript Frameworks →

The MDN Top 15

To recognize MDN's 15th year of helping developers build the web, here's a look at the fifteen pages most popular with our visitors in the past month:
  1. JavaScript landing page
  2. JavaScript: Using the Fetch API
  1. Map
  2. Filter
  3. ForEach
  4. Find
  5. Splice
  6. Slice
  7. Reduce
  • HTTP: CORS
    1. Promise
    2. Date
  • HTTP: Status
  • Regular Expressions
  • Object: Keys

  • Revisiting the MDN Developer Needs Assessment Report

    In case you missed it the first time around, we'd like to call attention to the Developer Needs Assessment Report from 2019, one of the more recent highlights in the history of MDN. It has already informed how we approach our work on MDN, and on Firefox. Keep an eye on the Hacks blog for news about the 2020 edition . . .

    Revisit the 2019 Developer Needs Assessment →

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